87501599 has 2 divisors, whose sum is σ = 87501600. Its totient is φ = 87501598.

The previous prime is 87501563. The next prime is 87501611. The reversal of 87501599 is 99510578.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87501599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87501509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43750799 + 43750800.

It is an arithmetic number, because the mean of its divisors is an integer number (43750800).

Almost surely, 2^87501599 is an apocalyptic number.

87501599 is a deficient number, since it is larger than the sum of its proper divisors (1).

87501599 is an equidigital number, since it uses as much as digits as its factorization.

87501599 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 87501599 is about 9354.2289366895. The cubic root of 87501599 is about 443.9547051567.

The spelling of 87501599 in words is "eighty-seven million, five hundred one thousand, five hundred ninety-nine".