87509951 has 2 divisors, whose sum is σ = 87509952. Its totient is φ = 87509950.

The previous prime is 87509927. The next prime is 87509977. The reversal of 87509951 is 15990578.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87509951 - 2¹⁸ = 87247807 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87509351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43754975 + 43754976.

It is an arithmetic number, because the mean of its divisors is an integer number (43754976).

Almost surely, 2^87509951 is an apocalyptic number.

87509951 is a deficient number, since it is larger than the sum of its proper divisors (1).

87509951 is an equidigital number, since it uses as much as digits as its factorization.

87509951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 87509951 is about 9354.6753551366. The cubic root of 87509951 is about 443.9688298195.

The spelling of 87509951 in words is "eighty-seven million, five hundred nine thousand, nine hundred fifty-one".