38915997 has 4 divisors (see below), whose sum is σ = 51888000. Its totient is φ = 25943996.

The previous prime is 38915993. The next prime is 38916013. The reversal of 38915997 is 79951983.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38915997 - 2² = 38915993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38915993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6485997 + ... + 6486002.

It is an arithmetic number, because the mean of its divisors is an integer number (12972000).

Almost surely, 2^38915997 is an apocalyptic number.

It is an amenable number.

38915997 is a deficient number, since it is larger than the sum of its proper divisors (12972003).

38915997 is a wasteful number, since it uses less digits than its factorization.

38915997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12972002.

The product of its digits is 612360, while the sum is 51.

The square root of 38915997 is about 6238.2687502223. The cubic root of 38915997 is about 338.8774889931.

The spelling of 38915997 in words is "thirty-eight million, nine hundred fifteen thousand, nine hundred ninety-seven".