57061787 has 4 divisors (see below), whose sum is σ = 57090696. Its totient is φ = 57032880.

The previous prime is 57061759. The next prime is 57061789. The reversal of 57061787 is 78716075.

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 57061787 - 2¹⁴ = 57045403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57061789) 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, 11258 + ... + 15519.

It is an arithmetic number, because the mean of its divisors is an integer number (14272674).

Almost surely, 2^57061787 is an apocalyptic number.

57061787 is a deficient number, since it is larger than the sum of its proper divisors (28909).

57061787 is a wasteful number, since it uses less digits than its factorization.

57061787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28908.

The product of its (nonzero) digits is 82320, while the sum is 41.

The square root of 57061787 is about 7553.9252710098. The cubic root of 57061787 is about 384.9891198365.

The spelling of 57061787 in words is "fifty-seven million, sixty-one thousand, seven hundred eighty-seven".