87591941 has 2 divisors, whose sum is σ = 87591942. Its totient is φ = 87591940.

The previous prime is 87591937. The next prime is 87591953. The reversal of 87591941 is 14919578.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63138916 + 24453025 = 7946^2 + 4945^2 .

It is a cyclic number.

It is not a de Polignac number, because 87591941 - 2² = 87591937 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 87591892 and 87591901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87591991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43795970 + 43795971.

It is an arithmetic number, because the mean of its divisors is an integer number (43795971).

Almost surely, 2^87591941 is an apocalyptic number.

It is an amenable number.

87591941 is a deficient number, since it is larger than the sum of its proper divisors (1).

87591941 is an equidigital number, since it uses as much as digits as its factorization.

87591941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 44.

The square root of 87591941 is about 9359.0566298105. The cubic root of 87591941 is about 444.1074412633.

The spelling of 87591941 in words is "eighty-seven million, five hundred ninety-one thousand, nine hundred forty-one".