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997371729 = 32332933289
BaseRepresentation
bin111011011100101…
…010111101010001
32120111201201210200
4323130222331101
54020311343404
6242545045413
733500343204
oct7334527521
92514651720
10997371729
11471a99162
1223a026869
1312b829ab3
149666593b
155c862839
hex3b72af51

997371729 has 12 divisors (see below), whose sum is σ = 1441124100. Its totient is φ = 664694784.

The previous prime is 997371709. The next prime is 997371733. The reversal of 997371729 is 927173799.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 170694225 + 826677504 = 13065^2 + 28752^2 .

It is not a de Polignac number, because 997371729 - 27 = 997371601 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (997371709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13317 + ... + 46605.

It is an arithmetic number, because the mean of its divisors is an integer number (120093675).

Almost surely, 2997371729 is an apocalyptic number.

997371729 is the 19974-th heptagonal number.

It is an amenable number.

997371729 is a deficient number, since it is larger than the sum of its proper divisors (443752371).

997371729 is a wasteful number, since it uses less digits than its factorization.

997371729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36624 (or 36621 counting only the distinct ones).

The product of its digits is 1500282, while the sum is 54.

The square root of 997371729 is about 31581.1926468903. The cubic root of 997371729 is about 999.1231410097.

The spelling of 997371729 in words is "nine hundred ninety-seven million, three hundred seventy-one thousand, seven hundred twenty-nine".

Divisors: 1 3 9 3329 9987 29961 33289 99867 299601 110819081 332457243 997371729