87147157 has 2 divisors, whose sum is σ = 87147158. Its totient is φ = 87147156.

The previous prime is 87147139. The next prime is 87147163. The reversal of 87147157 is 75174178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59120721 + 28026436 = 7689^2 + 5294^2 .

It is a cyclic number.

It is not a de Polignac number, because 87147157 - 2⁷ = 87147029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87147127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43573578 + 43573579.

It is an arithmetic number, because the mean of its divisors is an integer number (43573579).

Almost surely, 2^87147157 is an apocalyptic number.

It is an amenable number.

87147157 is a deficient number, since it is larger than the sum of its proper divisors (1).

87147157 is an equidigital number, since it uses as much as digits as its factorization.

87147157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54880, while the sum is 40.

The square root of 87147157 is about 9335.2641633753. The cubic root of 87147157 is about 443.3544527348.

The spelling of 87147157 in words is "eighty-seven million, one hundred forty-seven thousand, one hundred fifty-seven".