74252813 has 2 divisors, whose sum is σ = 74252814. Its totient is φ = 74252812.

The previous prime is 74252777. The next prime is 74252831. The reversal of 74252813 is 31825247.

Together with next prime (74252831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64032004 + 10220809 = 8002^2 + 3197^2 .

It is a cyclic number.

It is not a de Polignac number, because 74252813 - 2⁶ = 74252749 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 74252813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74252833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37126406 + 37126407.

It is an arithmetic number, because the mean of its divisors is an integer number (37126407).

Almost surely, 2^74252813 is an apocalyptic number.

It is an amenable number.

74252813 is a deficient number, since it is larger than the sum of its proper divisors (1).

74252813 is an equidigital number, since it uses as much as digits as its factorization.

74252813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 32.

The square root of 74252813 is about 8617.0071950765. The cubic root of 74252813 is about 420.3112073674.

The spelling of 74252813 in words is "seventy-four million, two hundred fifty-two thousand, eight hundred thirteen".