74545213 has 2 divisors, whose sum is σ = 74545214. Its totient is φ = 74545212.

The previous prime is 74545193. The next prime is 74545217. The reversal of 74545213 is 31254547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73908409 + 636804 = 8597^2 + 798^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74545213 is a prime.

It is equal to p_4369207 and since 74545213 and 4369207 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74545217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37272606 + 37272607.

It is an arithmetic number, because the mean of its divisors is an integer number (37272607).

Almost surely, 2^74545213 is an apocalyptic number.

It is an amenable number.

74545213 is a deficient number, since it is larger than the sum of its proper divisors (1).

74545213 is an equidigital number, since it uses as much as digits as its factorization.

74545213 is an evil number, because the sum of its binary digits is even.

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

The square root of 74545213 is about 8633.9569723273. The cubic root of 74545213 is about 420.8621989633.

The spelling of 74545213 in words is "seventy-four million, five hundred forty-five thousand, two hundred thirteen".