87158941 has 2 divisors, whose sum is σ = 87158942. Its totient is φ = 87158940.

The previous prime is 87158933. The next prime is 87158971. The reversal of 87158941 is 14985178.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48594841 + 38564100 = 6971^2 + 6210^2 .

It is a cyclic number.

It is not a de Polignac number, because 87158941 - 2³ = 87158933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87158971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43579470 + 43579471.

It is an arithmetic number, because the mean of its divisors is an integer number (43579471).

Almost surely, 2^87158941 is an apocalyptic number.

It is an amenable number.

87158941 is a deficient number, since it is larger than the sum of its proper divisors (1).

87158941 is an equidigital number, since it uses as much as digits as its factorization.

87158941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 43.

The square root of 87158941 is about 9335.8952971849. The cubic root of 87158941 is about 443.3744352318.

The spelling of 87158941 in words is "eighty-seven million, one hundred fifty-eight thousand, nine hundred forty-one".