87928157 has 2 divisors, whose sum is σ = 87928158. Its totient is φ = 87928156.

The previous prime is 87928153. The next prime is 87928193. The reversal of 87928157 is 75182978.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67551961 + 20376196 = 8219^2 + 4514^2 .

It is a cyclic number.

It is not a de Polignac number, because 87928157 - 2² = 87928153 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87928153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43964078 + 43964079.

It is an arithmetic number, because the mean of its divisors is an integer number (43964079).

Almost surely, 2^87928157 is an apocalyptic number.

It is an amenable number.

87928157 is a deficient number, since it is larger than the sum of its proper divisors (1).

87928157 is an equidigital number, since it uses as much as digits as its factorization.

87928157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 47.

The square root of 87928157 is about 9377.0014930147. The cubic root of 87928157 is about 444.6749416729.

The spelling of 87928157 in words is "eighty-seven million, nine hundred twenty-eight thousand, one hundred fifty-seven".