87158971 has 2 divisors, whose sum is σ = 87158972. Its totient is φ = 87158970.

The previous prime is 87158941. The next prime is 87158999. The reversal of 87158971 is 17985178.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87158971 - 2⁷ = 87158843 is a prime.

It is not a weakly prime, because it can be changed into another prime (87158941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43579485 + 43579486.

It is an arithmetic number, because the mean of its divisors is an integer number (43579486).

Almost surely, 2^87158971 is an apocalyptic number.

87158971 is a deficient number, since it is larger than the sum of its proper divisors (1).

87158971 is an equidigital number, since it uses as much as digits as its factorization.

87158971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 46.

The square root of 87158971 is about 9335.8969038866. The cubic root of 87158971 is about 443.3744861014.

The spelling of 87158971 in words is "eighty-seven million, one hundred fifty-eight thousand, nine hundred seventy-one".