57398989 has 2 divisors, whose sum is σ = 57398990. Its totient is φ = 57398988.

The previous prime is 57398977. The next prime is 57399103. The reversal of 57398989 is 98989375.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57123364 + 275625 = 7558^2 + 525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57398989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57398959) 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, 28699494 + 28699495.

It is an arithmetic number, because the mean of its divisors is an integer number (28699495).

Almost surely, 2^57398989 is an apocalyptic number.

It is an amenable number.

57398989 is a deficient number, since it is larger than the sum of its proper divisors (1).

57398989 is an equidigital number, since it uses as much as digits as its factorization.

57398989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4898880, while the sum is 58.

The square root of 57398989 is about 7576.2120482468. The cubic root of 57398989 is about 385.7459848989.

The spelling of 57398989 in words is "fifty-seven million, three hundred ninety-eight thousand, nine hundred eighty-nine".