74458381 has 2 divisors, whose sum is σ = 74458382. Its totient is φ = 74458380.

The previous prime is 74458367. The next prime is 74458403. The reversal of 74458381 is 18385447.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65755881 + 8702500 = 8109^2 + 2950^2 .

It is a cyclic number.

It is not a de Polignac number, because 74458381 - 2⁹ = 74457869 is a prime.

It is a super-2 number, since 2×74458381² = 11088101002282322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74458301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37229190 + 37229191.

It is an arithmetic number, because the mean of its divisors is an integer number (37229191).

Almost surely, 2^74458381 is an apocalyptic number.

It is an amenable number.

74458381 is a deficient number, since it is larger than the sum of its proper divisors (1).

74458381 is an equidigital number, since it uses as much as digits as its factorization.

74458381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 40.

The square root of 74458381 is about 8628.9269900724. The cubic root of 74458381 is about 420.6987254443.

The spelling of 74458381 in words is "seventy-four million, four hundred fifty-eight thousand, three hundred eighty-one".