39135897 has 6 divisors (see below), whose sum is σ = 56529642. Its totient is φ = 26090592.

The previous prime is 39135883. The next prime is 39135907. The reversal of 39135897 is 79853193.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 30702681 + 8433216 = 5541^2 + 2904^2 .

It is not a de Polignac number, because 39135897 - 2⁸ = 39135641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39135097) 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, 2174208 + ... + 2174225.

It is an arithmetic number, because the mean of its divisors is an integer number (9421607).

Almost surely, 2^39135897 is an apocalyptic number.

It is an amenable number.

39135897 is a deficient number, since it is larger than the sum of its proper divisors (17393745).

39135897 is a wasteful number, since it uses less digits than its factorization.

39135897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4348439 (or 4348436 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 39135897 is about 6255.8690043830. The cubic root of 39135897 is about 339.5145812294.

The spelling of 39135897 in words is "thirty-nine million, one hundred thirty-five thousand, eight hundred ninety-seven".