74578013 has 2 divisors, whose sum is σ = 74578014. Its totient is φ = 74578012.

The previous prime is 74578003. The next prime is 74578019. The reversal of 74578013 is 31087547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73239364 + 1338649 = 8558^2 + 1157^2 .

It is an emirp because it is prime and its reverse (31087547) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74578013 - 2⁶ = 74577949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74578019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37289006 + 37289007.

It is an arithmetic number, because the mean of its divisors is an integer number (37289007).

Almost surely, 2^74578013 is an apocalyptic number.

It is an amenable number.

74578013 is a deficient number, since it is larger than the sum of its proper divisors (1).

74578013 is an equidigital number, since it uses as much as digits as its factorization.

74578013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 74578013 is about 8635.8562401189. The cubic root of 74578013 is about 420.9239165681.

The spelling of 74578013 in words is "seventy-four million, five hundred seventy-eight thousand, thirteen".