57147797 has 4 divisors (see below), whose sum is σ = 65311776. Its totient is φ = 48983820.

The previous prime is 57147793. The next prime is 57147823. The reversal of 57147797 is 79774175.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 57147797 - 2² = 57147793 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 (57147791) 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, 4081979 + ... + 4081992.

It is an arithmetic number, because the mean of its divisors is an integer number (16327944).

Almost surely, 2^57147797 is an apocalyptic number.

It is an amenable number.

57147797 is a deficient number, since it is larger than the sum of its proper divisors (8163979).

57147797 is an equidigital number, since it uses as much as digits as its factorization.

57147797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8163978.

The product of its digits is 432180, while the sum is 47.

The square root of 57147797 is about 7559.6161939612. The cubic root of 57147797 is about 385.1824558247.

The spelling of 57147797 in words is "fifty-seven million, one hundred forty-seven thousand, seven hundred ninety-seven".