74974381 has 2 divisors, whose sum is σ = 74974382. Its totient is φ = 74974380.

The previous prime is 74974351. The next prime is 74974387. The reversal of 74974381 is 18347947.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67732900 + 7241481 = 8230^2 + 2691^2 .

It is a cyclic number.

It is not a de Polignac number, because 74974381 - 2⁵ = 74974349 is a prime.

It is a super-2 number, since 2×74974381² = 11242315612666322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74974387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37487190 + 37487191.

It is an arithmetic number, because the mean of its divisors is an integer number (37487191).

Almost surely, 2^74974381 is an apocalyptic number.

It is an amenable number.

74974381 is a deficient number, since it is larger than the sum of its proper divisors (1).

74974381 is an equidigital number, since it uses as much as digits as its factorization.

74974381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 43.

The square root of 74974381 is about 8658.7747978568. The cubic root of 74974381 is about 421.6683096237.

The spelling of 74974381 in words is "seventy-four million, nine hundred seventy-four thousand, three hundred eighty-one".