87397529 has 2 divisors, whose sum is σ = 87397530. Its totient is φ = 87397528.

The previous prime is 87397523. The next prime is 87397537. The reversal of 87397529 is 92579378.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61152400 + 26245129 = 7820^2 + 5123^2 .

It is a cyclic number.

It is not a de Polignac number, because 87397529 - 2⁸ = 87397273 is a prime.

It is not a weakly prime, because it can be changed into another prime (87397523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43698764 + 43698765.

It is an arithmetic number, because the mean of its divisors is an integer number (43698765).

Almost surely, 2^87397529 is an apocalyptic number.

It is an amenable number.

87397529 is a deficient number, since it is larger than the sum of its proper divisors (1).

87397529 is an equidigital number, since it uses as much as digits as its factorization.

87397529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 952560, while the sum is 50.

The square root of 87397529 is about 9348.6645570370. The cubic root of 87397529 is about 443.7786295355.

The spelling of 87397529 in words is "eighty-seven million, three hundred ninety-seven thousand, five hundred twenty-nine".