87332513 has 2 divisors, whose sum is σ = 87332514. Its totient is φ = 87332512.

The previous prime is 87332491. The next prime is 87332521. The reversal of 87332513 is 31523378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53831569 + 33500944 = 7337^2 + 5788^2 .

It is a cyclic number.

It is not a de Polignac number, because 87332513 - 2²⁰ = 86283937 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87332513.

It is not a weakly prime, because it can be changed into another prime (87332593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43666256 + 43666257.

It is an arithmetic number, because the mean of its divisors is an integer number (43666257).

Almost surely, 2^87332513 is an apocalyptic number.

It is an amenable number.

87332513 is a deficient number, since it is larger than the sum of its proper divisors (1).

87332513 is an equidigital number, since it uses as much as digits as its factorization.

87332513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 32.

The square root of 87332513 is about 9345.1866219996. The cubic root of 87332513 is about 443.6685582735.

The spelling of 87332513 in words is "eighty-seven million, three hundred thirty-two thousand, five hundred thirteen".