74430857 has 2 divisors, whose sum is σ = 74430858. Its totient is φ = 74430856.

The previous prime is 74430833. The next prime is 74430869. The reversal of 74430857 is 75803447.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72403081 + 2027776 = 8509^2 + 1424^2 .

It is a cyclic number.

It is not a de Polignac number, because 74430857 - 2⁶ = 74430793 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74430857.

It is not a weakly prime, because it can be changed into another prime (74430887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37215428 + 37215429.

It is an arithmetic number, because the mean of its divisors is an integer number (37215429).

Almost surely, 2^74430857 is an apocalyptic number.

It is an amenable number.

74430857 is a deficient number, since it is larger than the sum of its proper divisors (1).

74430857 is an equidigital number, since it uses as much as digits as its factorization.

74430857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94080, while the sum is 38.

The square root of 74430857 is about 8627.3319746026. The cubic root of 74430857 is about 420.6468810956.

The spelling of 74430857 in words is "seventy-four million, four hundred thirty thousand, eight hundred fifty-seven".