57661199 has 4 divisors (see below), whose sum is σ = 57697536. Its totient is φ = 57624864.

The previous prime is 57661189. The next prime is 57661213. The reversal of 57661199 is 99116675.

It is a happy number.

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 57661199 - 2⁴ = 57661183 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 (57661169) 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, 15674 + ... + 18999.

It is an arithmetic number, because the mean of its divisors is an integer number (14424384).

Almost surely, 2^57661199 is an apocalyptic number.

57661199 is a deficient number, since it is larger than the sum of its proper divisors (36337).

57661199 is a wasteful number, since it uses less digits than its factorization.

57661199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36336.

The product of its digits is 102060, while the sum is 44.

The square root of 57661199 is about 7593.4971521691. The cubic root of 57661199 is about 386.3324808582.

The spelling of 57661199 in words is "fifty-seven million, six hundred sixty-one thousand, one hundred ninety-nine".