57020347 has 4 divisors (see below), whose sum is σ = 57145576. Its totient is φ = 56895120.

The previous prime is 57020317. The next prime is 57020399. The reversal of 57020347 is 74302075.

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 57020347 - 2¹⁹ = 56496059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57020317) 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, 61929 + ... + 62842.

It is an arithmetic number, because the mean of its divisors is an integer number (14286394).

Almost surely, 2^57020347 is an apocalyptic number.

57020347 is a deficient number, since it is larger than the sum of its proper divisors (125229).

57020347 is a wasteful number, since it uses less digits than its factorization.

57020347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125228.

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 57020347 is about 7551.1818280320. The cubic root of 57020347 is about 384.8959003423.

The spelling of 57020347 in words is "fifty-seven million, twenty thousand, three hundred forty-seven".