87625841 has 2 divisors, whose sum is σ = 87625842. Its totient is φ = 87625840.

The previous prime is 87625817. The next prime is 87625861. The reversal of 87625841 is 14852678.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78145600 + 9480241 = 8840^2 + 3079^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87625841 is a prime.

It is a super-3 number, since 3×87625841³ (a number of 25 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (87625861) 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, 43812920 + 43812921.

It is an arithmetic number, because the mean of its divisors is an integer number (43812921).

Almost surely, 2^87625841 is an apocalyptic number.

It is an amenable number.

87625841 is a deficient number, since it is larger than the sum of its proper divisors (1).

87625841 is an equidigital number, since it uses as much as digits as its factorization.

87625841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 41.

The square root of 87625841 is about 9360.8675345825. The cubic root of 87625841 is about 444.1647269765.

The spelling of 87625841 in words is "eighty-seven million, six hundred twenty-five thousand, eight hundred forty-one".