917382157 has 4 divisors (see below), whose sum is σ = 931074496. Its totient is φ = 903689820.

The previous prime is 917382119. The next prime is 917382161. The reversal of 917382157 is 751283719.

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 917382157 - 2²⁷ = 783164429 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 (917382457) 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, 6846069 + ... + 6846202.

It is an arithmetic number, because the mean of its divisors is an integer number (232768624).

Almost surely, 2^917382157 is an apocalyptic number.

It is an amenable number.

917382157 is a deficient number, since it is larger than the sum of its proper divisors (13692339).

917382157 is a wasteful number, since it uses less digits than its factorization.

917382157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13692338.

The product of its digits is 105840, while the sum is 43.

The square root of 917382157 is about 30288.3171701565. The cubic root of 917382157 is about 971.6654553416.

The spelling of 917382157 in words is "nine hundred seventeen million, three hundred eighty-two thousand, one hundred fifty-seven".