57012091 has 4 divisors (see below), whose sum is σ = 57045384. Its totient is φ = 56978800.

The previous prime is 57012083. The next prime is 57012097. The reversal of 57012091 is 19021075.

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 57012091 - 2³ = 57012083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57012097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13930 + ... + 17551.

It is an arithmetic number, because the mean of its divisors is an integer number (14261346).

Almost surely, 2^57012091 is an apocalyptic number.

57012091 is a deficient number, since it is larger than the sum of its proper divisors (33293).

57012091 is a wasteful number, since it uses less digits than its factorization.

57012091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33292.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 57012091 is about 7550.6351388476. The cubic root of 57012091 is about 384.8773230326.

The spelling of 57012091 in words is "fifty-seven million, twelve thousand, ninety-one".