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2981997 = 32331333
BaseRepresentation
bin1011011000000001101101
312121111112100
423120001231
51230410442
6143525313
734226604
oct13300155
95544470
102981997
111757467
12bb9839
138053c5
14578a3b
153dd84c
hex2d806d

2981997 has 6 divisors (see below), whose sum is σ = 4307342. Its totient is φ = 1987992.

The previous prime is 2981981. The next prime is 2981999. The reversal of 2981997 is 7991892.

2981997 is nontrivially palindromic in base 2.

It can be written as a sum of positive squares in only one way, i.e., 1929321 + 1052676 = 1389^2 + 1026^2 .

It is not a de Polignac number, because 2981997 - 24 = 2981981 is a prime.

It is a super-2 number, since 2×29819972 = 17784612216018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2981999) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 165658 + ... + 165675.

22981997 is an apocalyptic number.

It is an amenable number.

2981997 is a deficient number, since it is larger than the sum of its proper divisors (1325345).

2981997 is a wasteful number, since it uses less digits than its factorization.

2981997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331339 (or 331336 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 2981997 is about 1726.8459688113. The cubic root of 2981997 is about 143.9358800179.

The spelling of 2981997 in words is "two million, nine hundred eighty-one thousand, nine hundred ninety-seven".

Divisors: 1 3 9 331333 993999 2981997