57438187 has 2 divisors, whose sum is σ = 57438188. Its totient is φ = 57438186.

The previous prime is 57438169. The next prime is 57438233. The reversal of 57438187 is 78183475.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57438187 - 2¹⁵ = 57405419 is a prime.

It is not a weakly prime, because it can be changed into another prime (57438287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28719093 + 28719094.

It is an arithmetic number, because the mean of its divisors is an integer number (28719094).

Almost surely, 2^57438187 is an apocalyptic number.

57438187 is a deficient number, since it is larger than the sum of its proper divisors (1).

57438187 is an equidigital number, since it uses as much as digits as its factorization.

57438187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188160, while the sum is 43.

The square root of 57438187 is about 7578.7985195544. The cubic root of 57438187 is about 385.8337740786.

It can be divided in two parts, 57 and 438187, that added together give a square (438244 = 662²).

The spelling of 57438187 in words is "fifty-seven million, four hundred thirty-eight thousand, one hundred eighty-seven".