87148513 has 2 divisors, whose sum is σ = 87148514. Its totient is φ = 87148512.

The previous prime is 87148507. The next prime is 87148517. The reversal of 87148513 is 31584178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44729344 + 42419169 = 6688^2 + 6513^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87148513 is a prime.

It is a super-2 number, since 2×87148513² = 15189726636222338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87148517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43574256 + 43574257.

It is an arithmetic number, because the mean of its divisors is an integer number (43574257).

Almost surely, 2^87148513 is an apocalyptic number.

It is an amenable number.

87148513 is a deficient number, since it is larger than the sum of its proper divisors (1).

87148513 is an equidigital number, since it uses as much as digits as its factorization.

87148513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 37.

The square root of 87148513 is about 9335.3367909251. The cubic root of 87148513 is about 443.3567522381.

The spelling of 87148513 in words is "eighty-seven million, one hundred forty-eight thousand, five hundred thirteen".