57978829 has 2 divisors, whose sum is σ = 57978830. Its totient is φ = 57978828.

The previous prime is 57978821. The next prime is 57978839. The reversal of 57978829 is 92887975.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49140100 + 8838729 = 7010^2 + 2973^2 .

It is a cyclic number.

It is not a de Polignac number, because 57978829 - 2³ = 57978821 is a prime.

It is a super-2 number, since 2×57978829² = 6723089224422482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 57978829.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57978821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28989414 + 28989415.

It is an arithmetic number, because the mean of its divisors is an integer number (28989415).

Almost surely, 2^57978829 is an apocalyptic number.

It is an amenable number.

57978829 is a deficient number, since it is larger than the sum of its proper divisors (1).

57978829 is an equidigital number, since it uses as much as digits as its factorization.

57978829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 55.

The square root of 57978829 is about 7614.3830347573. The cubic root of 57978829 is about 387.0405604407.

The spelling of 57978829 in words is "fifty-seven million, nine hundred seventy-eight thousand, eight hundred twenty-nine".