87272617 has 2 divisors, whose sum is σ = 87272618. Its totient is φ = 87272616.

The previous prime is 87272573. The next prime is 87272663. The reversal of 87272617 is 71627278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87216921 + 55696 = 9339^2 + 236^2 .

It is a cyclic number.

It is not a de Polignac number, because 87272617 - 2²³ = 78884009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87272617.

It is not a weakly prime, because it can be changed into another prime (87272417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43636308 + 43636309.

It is an arithmetic number, because the mean of its divisors is an integer number (43636309).

Almost surely, 2^87272617 is an apocalyptic number.

It is an amenable number.

87272617 is a deficient number, since it is larger than the sum of its proper divisors (1).

87272617 is an equidigital number, since it uses as much as digits as its factorization.

87272617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65856, while the sum is 40.

The square root of 87272617 is about 9341.9814279413. The cubic root of 87272617 is about 443.5671067502.

The spelling of 87272617 in words is "eighty-seven million, two hundred seventy-two thousand, six hundred seventeen".