34239681 has 18 divisors (see below), whose sum is σ = 57532722. Its totient is φ = 19565280.

The previous prime is 34239661. The next prime is 34239697. The reversal of 34239681 is 18693243.

It can be written as a sum of positive squares in only one way, i.e., 21344400 + 12895281 = 4620^2 + 3591^2 .

It is not a de Polignac number, because 34239681 - 2⁷ = 34239553 is a prime.

It is a super-2 number, since 2×34239681² = 2344711509963522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (34239631) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 38380 + ... + 39261.

Almost surely, 2^34239681 is an apocalyptic number.

It is an amenable number.

34239681 is a deficient number, since it is larger than the sum of its proper divisors (23293041).

34239681 is a wasteful number, since it uses less digits than its factorization.

34239681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77661 (or 77651 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 34239681 is about 5851.4682772788. The cubic root of 34239681 is about 324.7206467361.

The spelling of 34239681 in words is "thirty-four million, two hundred thirty-nine thousand, six hundred eighty-one".