74477857 has 2 divisors, whose sum is σ = 74477858. Its totient is φ = 74477856.

The previous prime is 74477839. The next prime is 74477873. The reversal of 74477857 is 75877447.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47114496 + 27363361 = 6864^2 + 5231^2 .

It is a cyclic number.

It is not a de Polignac number, because 74477857 - 2¹¹ = 74475809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74477857.

It is not a weakly prime, because it can be changed into another prime (74477807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37238928 + 37238929.

It is an arithmetic number, because the mean of its divisors is an integer number (37238929).

Almost surely, 2^74477857 is an apocalyptic number.

It is an amenable number.

74477857 is a deficient number, since it is larger than the sum of its proper divisors (1).

74477857 is an equidigital number, since it uses as much as digits as its factorization.

74477857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536640, while the sum is 49.

The square root of 74477857 is about 8630.0554459401. The cubic root of 74477857 is about 420.7354028202.

The spelling of 74477857 in words is "seventy-four million, four hundred seventy-seven thousand, eight hundred fifty-seven".