57149447 has 4 divisors (see below), whose sum is σ = 57704400. Its totient is φ = 56594496.

The previous prime is 57149431. The next prime is 57149453. The reversal of 57149447 is 74494175.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 57149447 - 2⁴ = 57149431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57149047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277322 + ... + 277527.

It is an arithmetic number, because the mean of its divisors is an integer number (14426100).

Almost surely, 2^57149447 is an apocalyptic number.

57149447 is a deficient number, since it is larger than the sum of its proper divisors (554953).

57149447 is a wasteful number, since it uses less digits than its factorization.

57149447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554952.

The product of its digits is 141120, while the sum is 41.

The square root of 57149447 is about 7559.7253256980. The cubic root of 57149447 is about 385.1861628496.

The spelling of 57149447 in words is "fifty-seven million, one hundred forty-nine thousand, four hundred forty-seven".