38931897 has 8 divisors (see below), whose sum is σ = 52534944. Its totient is φ = 25641728.

The previous prime is 38931869. The next prime is 38931923. The reversal of 38931897 is 79813983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38931897 - 2⁷ = 38931769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38931197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77928 + ... + 78425.

It is an arithmetic number, because the mean of its divisors is an integer number (6566868).

Almost surely, 2^38931897 is an apocalyptic number.

It is an amenable number.

38931897 is a deficient number, since it is larger than the sum of its proper divisors (13603047).

38931897 is a wasteful number, since it uses less digits than its factorization.

38931897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156439.

The product of its digits is 326592, while the sum is 48.

The square root of 38931897 is about 6239.5430121123. The cubic root of 38931897 is about 338.9236346988.

The spelling of 38931897 in words is "thirty-eight million, nine hundred thirty-one thousand, eight hundred ninety-seven".