87692621 has 2 divisors, whose sum is σ = 87692622. Its totient is φ = 87692620.

The previous prime is 87692617. The next prime is 87692651. The reversal of 87692621 is 12629678.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65836996 + 21855625 = 8114^2 + 4675^2 .

It is a cyclic number.

It is not a de Polignac number, because 87692621 - 2² = 87692617 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87692651) 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, 43846310 + 43846311.

It is an arithmetic number, because the mean of its divisors is an integer number (43846311).

Almost surely, 2^87692621 is an apocalyptic number.

It is an amenable number.

87692621 is a deficient number, since it is larger than the sum of its proper divisors (1).

87692621 is an equidigital number, since it uses as much as digits as its factorization.

87692621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 41.

The square root of 87692621 is about 9364.4338323254. The cubic root of 87692621 is about 444.2775315568.

The spelling of 87692621 in words is "eighty-seven million, six hundred ninety-two thousand, six hundred twenty-one".