57069991 has 8 divisors (see below), whose sum is σ = 63777168. Its totient is φ = 50616000.

The previous prime is 57069983. The next prime is 57070001. The reversal of 57069991 is 19996075.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57069991 - 2³ = 57069983 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 (57069911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62820 + ... + 63721.

It is an arithmetic number, because the mean of its divisors is an integer number (7972146).

Almost surely, 2^57069991 is an apocalyptic number.

57069991 is a deficient number, since it is larger than the sum of its proper divisors (6707177).

57069991 is a wasteful number, since it uses less digits than its factorization.

57069991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126593.

The product of its (nonzero) digits is 153090, while the sum is 46.

The square root of 57069991 is about 7554.4682804285. The cubic root of 57069991 is about 385.0075694245.

The spelling of 57069991 in words is "fifty-seven million, sixty-nine thousand, nine hundred ninety-one".