87392251 has 2 divisors, whose sum is σ = 87392252. Its totient is φ = 87392250.

The previous prime is 87392237. The next prime is 87392273. The reversal of 87392251 is 15229378.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87392251 - 2⁹ = 87391739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87392251.

It is not a weakly prime, because it can be changed into another prime (87392281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43696125 + 43696126.

It is an arithmetic number, because the mean of its divisors is an integer number (43696126).

Almost surely, 2^87392251 is an apocalyptic number.

87392251 is a deficient number, since it is larger than the sum of its proper divisors (1).

87392251 is an equidigital number, since it uses as much as digits as its factorization.

87392251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 37.

The square root of 87392251 is about 9348.3822664673. The cubic root of 87392251 is about 443.7696959849.

The spelling of 87392251 in words is "eighty-seven million, three hundred ninety-two thousand, two hundred fifty-one".