74861513 has 2 divisors, whose sum is σ = 74861514. Its totient is φ = 74861512.

The previous prime is 74861467. The next prime is 74861519. The reversal of 74861513 is 31516847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59783824 + 15077689 = 7732^2 + 3883^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74861513 is a prime.

It is a super-2 number, since 2×74861513² = 11208492257298338, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74861519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37430756 + 37430757.

It is an arithmetic number, because the mean of its divisors is an integer number (37430757).

Almost surely, 2^74861513 is an apocalyptic number.

It is an amenable number.

74861513 is a deficient number, since it is larger than the sum of its proper divisors (1).

74861513 is an equidigital number, since it uses as much as digits as its factorization.

74861513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 35.

The square root of 74861513 is about 8652.2547928271. The cubic root of 74861513 is about 421.4566072592.

The spelling of 74861513 in words is "seventy-four million, eight hundred sixty-one thousand, five hundred thirteen".