8919157 has 4 divisors (see below), whose sum is σ = 9605260. Its totient is φ = 8233056.

The previous prime is 8919149. The next prime is 8919161. The reversal of 8919157 is 7519198.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4955076 + 3964081 = 2226^2 + 1991^2 .

It is not a de Polignac number, because 8919157 - 2³ = 8919149 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 (8919167) 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, 343032 + ... + 343057.

It is an arithmetic number, because the mean of its divisors is an integer number (2401315).

Almost surely, 2^8919157 is an apocalyptic number.

It is an amenable number.

8919157 is a deficient number, since it is larger than the sum of its proper divisors (686103).

8919157 is a wasteful number, since it uses less digits than its factorization.

8919157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686102.

The product of its digits is 22680, while the sum is 40.

The square root of 8919157 is about 2986.4957726406. The cubic root of 8919157 is about 207.3836925011.

The spelling of 8919157 in words is "eight million, nine hundred nineteen thousand, one hundred fifty-seven".