74333561 has 2 divisors, whose sum is σ = 74333562. Its totient is φ = 74333560.

The previous prime is 74333557. The next prime is 74333579. The reversal of 74333561 is 16533347.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52998400 + 21335161 = 7280^2 + 4619^2 .

It is an emirp because it is prime and its reverse (16533347) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74333561 - 2² = 74333557 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74333551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37166780 + 37166781.

It is an arithmetic number, because the mean of its divisors is an integer number (37166781).

Almost surely, 2^74333561 is an apocalyptic number.

It is an amenable number.

74333561 is a deficient number, since it is larger than the sum of its proper divisors (1).

74333561 is an equidigital number, since it uses as much as digits as its factorization.

74333561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 32.

The square root of 74333561 is about 8621.6913073944. The cubic root of 74333561 is about 420.4635113351.

The spelling of 74333561 in words is "seventy-four million, three hundred thirty-three thousand, five hundred sixty-one".