57398493 has 4 divisors (see below), whose sum is σ = 76531328. Its totient is φ = 38265660.

The previous prime is 57398491. The next prime is 57398531. The reversal of 57398493 is 39489375.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 57398493 - 2¹ = 57398491 is a prime.

It is a super-3 number, since 3×57398493³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57398491) 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 in 3 ways as a sum of consecutive naturals, for example, 9566413 + ... + 9566418.

It is an arithmetic number, because the mean of its divisors is an integer number (19132832).

Almost surely, 2^57398493 is an apocalyptic number.

It is an amenable number.

57398493 is a deficient number, since it is larger than the sum of its proper divisors (19132835).

57398493 is a wasteful number, since it uses less digits than its factorization.

57398493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19132834.

The product of its digits is 816480, while the sum is 48.

The square root of 57398493 is about 7576.1793141398. The cubic root of 57398493 is about 385.7448737843.

The spelling of 57398493 in words is "fifty-seven million, three hundred ninety-eight thousand, four hundred ninety-three".