32697981 has 6 divisors (see below), whose sum is σ = 47230430. Its totient is φ = 21798648.

The previous prime is 32697971. The next prime is 32697983. The reversal of 32697981 is 18979623.

It can be written as a sum of positive squares in only one way, i.e., 32148900 + 549081 = 5670^2 + 741^2 .

It is not a de Polignac number, because 32697981 - 2⁵ = 32697949 is a prime.

It is a super-2 number, since 2×32697981² = 2138315922952722, 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 (32697983) 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, 1816546 + ... + 1816563.

Almost surely, 2^32697981 is an apocalyptic number.

It is an amenable number.

32697981 is a deficient number, since it is larger than the sum of its proper divisors (14532449).

32697981 is a wasteful number, since it uses less digits than its factorization.

32697981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3633115 (or 3633112 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 32697981 is about 5718.2148438127. The cubic root of 32697981 is about 319.7719110295.

The spelling of 32697981 in words is "thirty-two million, six hundred ninety-seven thousand, nine hundred eighty-one".