74399251 has 2 divisors, whose sum is σ = 74399252. Its totient is φ = 74399250.

The previous prime is 74399243. The next prime is 74399257. The reversal of 74399251 is 15299347.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74399251 - 2³ = 74399243 is a prime.

It is a super-2 number, since 2×74399251² = 11070497098722002, which contains 22 as substring.

It is a Chen prime.

It is the 8626-th Hogben number.

It is not a weakly prime, because it can be changed into another prime (74399257) by changing a digit.

It is a nontrivial repunit in base 8625.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37199625 + 37199626.

It is an arithmetic number, because the mean of its divisors is an integer number (37199626).

Almost surely, 2^74399251 is an apocalyptic number.

74399251 is a deficient number, since it is larger than the sum of its proper divisors (1).

74399251 is an equidigital number, since it uses as much as digits as its factorization.

74399251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 40.

The square root of 74399251 is about 8625.5000434757. The cubic root of 74399251 is about 420.5873321033.

The spelling of 74399251 in words is "seventy-four million, three hundred ninety-nine thousand, two hundred fifty-one".