74000557 has 2 divisors, whose sum is σ = 74000558. Its totient is φ = 74000556.

The previous prime is 74000551. The next prime is 74000587. The reversal of 74000557 is 75500047.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45549001 + 28451556 = 6749^2 + 5334^2 .

It is a cyclic number.

It is not a de Polignac number, because 74000557 - 2⁷ = 74000429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74000551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37000278 + 37000279.

It is an arithmetic number, because the mean of its divisors is an integer number (37000279).

Almost surely, 2^74000557 is an apocalyptic number.

It is an amenable number.

74000557 is a deficient number, since it is larger than the sum of its proper divisors (1).

74000557 is an equidigital number, since it uses as much as digits as its factorization.

74000557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4900, while the sum is 28.

The square root of 74000557 is about 8602.3576419491. The cubic root of 74000557 is about 419.8346987446.

The spelling of 74000557 in words is "seventy-four million, five hundred fifty-seven", and thus it is an aban number.