87056573 has 2 divisors, whose sum is σ = 87056574. Its totient is φ = 87056572.

The previous prime is 87056569. The next prime is 87056617. The reversal of 87056573 is 37565078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59567524 + 27489049 = 7718^2 + 5243^2 .

It is a cyclic number.

It is not a de Polignac number, because 87056573 - 2² = 87056569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87056573.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87056273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43528286 + 43528287.

It is an arithmetic number, because the mean of its divisors is an integer number (43528287).

Almost surely, 2^87056573 is an apocalyptic number.

It is an amenable number.

87056573 is a deficient number, since it is larger than the sum of its proper divisors (1).

87056573 is an equidigital number, since it uses as much as digits as its factorization.

87056573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 176400, while the sum is 41.

The square root of 87056573 is about 9330.4111913677. The cubic root of 87056573 is about 443.2007864380.

The spelling of 87056573 in words is "eighty-seven million, fifty-six thousand, five hundred seventy-three".