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997030831 is a prime number
BaseRepresentation
bin111011011011010…
…111101110101111
32120111002102011211
4323123113232233
54020214441311
6242533455251
733464423266
oct7333275657
92514072154
10997030831
11471886025
12239aa1527
1312b73a894
14965b75dd
155c7e6821
hex3b6d7baf

997030831 has 2 divisors, whose sum is σ = 997030832. Its totient is φ = 997030830.

The previous prime is 997030799. The next prime is 997030873. The reversal of 997030831 is 138030799.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 997030831 - 25 = 997030799 is a prime.

It is a super-2 number, since 2×9970308312 = 1988140955929101122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997030891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498515415 + 498515416.

It is an arithmetic number, because the mean of its divisors is an integer number (498515416).

Almost surely, 2997030831 is an apocalyptic number.

997030831 is a deficient number, since it is larger than the sum of its proper divisors (1).

997030831 is an equidigital number, since it uses as much as digits as its factorization.

997030831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 997030831 is about 31575.7950177030. The cubic root of 997030831 is about 999.0092958294.

The spelling of 997030831 in words is "nine hundred ninety-seven million, thirty thousand, eight hundred thirty-one".