87617393 has 2 divisors, whose sum is σ = 87617394. Its totient is φ = 87617392.

The previous prime is 87617389. The next prime is 87617401. The reversal of 87617393 is 39371678.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81938704 + 5678689 = 9052^2 + 2383^2 .

It is a cyclic number.

It is not a de Polignac number, because 87617393 - 2² = 87617389 is a prime.

It is a super-2 number, since 2×87617393² = 15353615112232898, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87617293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43808696 + 43808697.

It is an arithmetic number, because the mean of its divisors is an integer number (43808697).

Almost surely, 2^87617393 is an apocalyptic number.

It is an amenable number.

87617393 is a deficient number, since it is larger than the sum of its proper divisors (1).

87617393 is an equidigital number, since it uses as much as digits as its factorization.

87617393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 44.

The square root of 87617393 is about 9360.4162834780. The cubic root of 87617393 is about 444.1504525564.

The spelling of 87617393 in words is "eighty-seven million, six hundred seventeen thousand, three hundred ninety-three".