74245513 has 2 divisors, whose sum is σ = 74245514. Its totient is φ = 74245512.

The previous prime is 74245489. The next prime is 74245517. The reversal of 74245513 is 31554247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73136704 + 1108809 = 8552^2 + 1053^2 .

It is a cyclic number.

It is not a de Polignac number, because 74245513 - 2¹³ = 74237321 is a prime.

It is not a weakly prime, because it can be changed into another prime (74245517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37122756 + 37122757.

It is an arithmetic number, because the mean of its divisors is an integer number (37122757).

Almost surely, 2^74245513 is an apocalyptic number.

It is an amenable number.

74245513 is a deficient number, since it is larger than the sum of its proper divisors (1).

74245513 is an equidigital number, since it uses as much as digits as its factorization.

74245513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 31.

The square root of 74245513 is about 8616.5836037260. The cubic root of 74245513 is about 420.2974329291.

The spelling of 74245513 in words is "seventy-four million, two hundred forty-five thousand, five hundred thirteen".