87692251 has 2 divisors, whose sum is σ = 87692252. Its totient is φ = 87692250.

The previous prime is 87692249. The next prime is 87692303. The reversal of 87692251 is 15229678.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87692251 - 2¹ = 87692249 is a prime.

Together with 87692249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (87692551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43846125 + 43846126.

It is an arithmetic number, because the mean of its divisors is an integer number (43846126).

Almost surely, 2^87692251 is an apocalyptic number.

87692251 is a deficient number, since it is larger than the sum of its proper divisors (1).

87692251 is an equidigital number, since it uses as much as digits as its factorization.

87692251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 40.

The square root of 87692251 is about 9364.4140767055. The cubic root of 87692251 is about 444.2769067117.

The spelling of 87692251 in words is "eighty-seven million, six hundred ninety-two thousand, two hundred fifty-one".