38917157 has 4 divisors (see below), whose sum is σ = 38955936. Its totient is φ = 38878380.

The previous prime is 38917147. The next prime is 38917171. The reversal of 38917157 is 75171983.

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 38917157 - 2⁴ = 38917141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38917117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17843 + ... + 19904.

It is an arithmetic number, because the mean of its divisors is an integer number (9738984).

Almost surely, 2^38917157 is an apocalyptic number.

It is an amenable number.

38917157 is a deficient number, since it is larger than the sum of its proper divisors (38779).

38917157 is a wasteful number, since it uses less digits than its factorization.

38917157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38778.

The product of its digits is 52920, while the sum is 41.

The square root of 38917157 is about 6238.3617240426. The cubic root of 38917157 is about 338.8808560231.

The spelling of 38917157 in words is "thirty-eight million, nine hundred seventeen thousand, one hundred fifty-seven".