87625789 has 2 divisors, whose sum is σ = 87625790. Its totient is φ = 87625788.

The previous prime is 87625771. The next prime is 87625799. The reversal of 87625789 is 98752678.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57836025 + 29789764 = 7605^2 + 5458^2 .

It is a cyclic number.

It is not a de Polignac number, because 87625789 - 2⁷ = 87625661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87625799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43812894 + 43812895.

It is an arithmetic number, because the mean of its divisors is an integer number (43812895).

Almost surely, 2^87625789 is an apocalyptic number.

It is an amenable number.

87625789 is a deficient number, since it is larger than the sum of its proper divisors (1).

87625789 is an equidigital number, since it uses as much as digits as its factorization.

87625789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 52.

The square root of 87625789 is about 9360.8647570617. The cubic root of 87625789 is about 444.1646391160.

The spelling of 87625789 in words is "eighty-seven million, six hundred twenty-five thousand, seven hundred eighty-nine".