74765381 has 2 divisors, whose sum is σ = 74765382. Its totient is φ = 74765380.

The previous prime is 74765311. The next prime is 74765413. The reversal of 74765381 is 18356747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67092481 + 7672900 = 8191^2 + 2770^2 .

It is a cyclic number.

It is not a de Polignac number, because 74765381 - 2¹⁴ = 74748997 is a prime.

It is a super-2 number, since 2×74765381² = 11179724392150322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74765311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37382690 + 37382691.

It is an arithmetic number, because the mean of its divisors is an integer number (37382691).

Almost surely, 2^74765381 is an apocalyptic number.

It is an amenable number.

74765381 is a deficient number, since it is larger than the sum of its proper divisors (1).

74765381 is an equidigital number, since it uses as much as digits as its factorization.

74765381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 41.

The square root of 74765381 is about 8646.6976933393. The cubic root of 74765381 is about 421.2761281331.

The spelling of 74765381 in words is "seventy-four million, seven hundred sixty-five thousand, three hundred eighty-one".