87625771 has 2 divisors, whose sum is σ = 87625772. Its totient is φ = 87625770.

The previous prime is 87625763. The next prime is 87625789. The reversal of 87625771 is 17752678.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87625771 - 2³ = 87625763 is a prime.

It is not a weakly prime, because it can be changed into another prime (87625171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43812885 + 43812886.

It is an arithmetic number, because the mean of its divisors is an integer number (43812886).

Almost surely, 2^87625771 is an apocalyptic number.

87625771 is a deficient number, since it is larger than the sum of its proper divisors (1).

87625771 is an equidigital number, since it uses as much as digits as its factorization.

87625771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 164640, while the sum is 43.

The square root of 87625771 is about 9360.8637956120. The cubic root of 87625771 is about 444.1646087027.

The spelling of 87625771 in words is "eighty-seven million, six hundred twenty-five thousand, seven hundred seventy-one".