87241613 has 2 divisors, whose sum is σ = 87241614. Its totient is φ = 87241612.

The previous prime is 87241579. The next prime is 87241619. The reversal of 87241613 is 31614278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71859529 + 15382084 = 8477^2 + 3922^2 .

It is a cyclic number.

It is not a de Polignac number, because 87241613 - 2²⁴ = 70464397 is a prime.

It is a super-2 number, since 2×87241613² = 15222198077683538, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87241613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87241619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43620806 + 43620807.

It is an arithmetic number, because the mean of its divisors is an integer number (43620807).

Almost surely, 2^87241613 is an apocalyptic number.

It is an amenable number.

87241613 is a deficient number, since it is larger than the sum of its proper divisors (1).

87241613 is an equidigital number, since it uses as much as digits as its factorization.

87241613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 32.

The square root of 87241613 is about 9340.3218895282. The cubic root of 87241613 is about 443.5145741082.

The spelling of 87241613 in words is "eighty-seven million, two hundred forty-one thousand, six hundred thirteen".