74524381 has 2 divisors, whose sum is σ = 74524382. Its totient is φ = 74524380.

The previous prime is 74524367. The next prime is 74524391. The reversal of 74524381 is 18342547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65464281 + 9060100 = 8091^2 + 3010^2 .

It is an emirp because it is prime and its reverse (18342547) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74524381 is a prime.

It is a super-2 number, since 2×74524381² = 11107766726866322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74524391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37262190 + 37262191.

It is an arithmetic number, because the mean of its divisors is an integer number (37262191).

Almost surely, 2^74524381 is an apocalyptic number.

It is an amenable number.

74524381 is a deficient number, since it is larger than the sum of its proper divisors (1).

74524381 is an equidigital number, since it uses as much as digits as its factorization.

74524381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 34.

The square root of 74524381 is about 8632.7504886913. The cubic root of 74524381 is about 420.8229913567.

The spelling of 74524381 in words is "seventy-four million, five hundred twenty-four thousand, three hundred eighty-one".