74400761 has 2 divisors, whose sum is σ = 74400762. Its totient is φ = 74400760.

The previous prime is 74400757. The next prime is 74400769. The reversal of 74400761 is 16700447.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65286400 + 9114361 = 8080^2 + 3019^2 .

It is a cyclic number.

It is not a de Polignac number, because 74400761 - 2² = 74400757 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74400769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37200380 + 37200381.

It is an arithmetic number, because the mean of its divisors is an integer number (37200381).

Almost surely, 2^74400761 is an apocalyptic number.

It is an amenable number.

74400761 is a deficient number, since it is larger than the sum of its proper divisors (1).

74400761 is an equidigital number, since it uses as much as digits as its factorization.

74400761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 74400761 is about 8625.5875741888. The cubic root of 74400761 is about 420.5901774840.

The spelling of 74400761 in words is "seventy-four million, four hundred thousand, seven hundred sixty-one".