74868557 has 2 divisors, whose sum is σ = 74868558. Its totient is φ = 74868556.

The previous prime is 74868553. The next prime is 74868587. The reversal of 74868557 is 75586847.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52722121 + 22146436 = 7261^2 + 4706^2 .

It is a cyclic number.

It is not a de Polignac number, because 74868557 - 2² = 74868553 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74868553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37434278 + 37434279.

It is an arithmetic number, because the mean of its divisors is an integer number (37434279).

Almost surely, 2^74868557 is an apocalyptic number.

It is an amenable number.

74868557 is a deficient number, since it is larger than the sum of its proper divisors (1).

74868557 is an equidigital number, since it uses as much as digits as its factorization.

74868557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1881600, while the sum is 50.

The square root of 74868557 is about 8652.6618447735. The cubic root of 74868557 is about 421.4698256546.

The spelling of 74868557 in words is "seventy-four million, eight hundred sixty-eight thousand, five hundred fifty-seven".