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57139379 = 115194489
BaseRepresentation
bin1101100111111…
…0000010110011
310222111222111022
43121332002303
5104111430004
65400410055
71262451053
oct331760263
9128458438
1057139379
112a287730
121717692b
13bab7bab
147835563
15503a2be
hex367e0b3

57139379 has 4 divisors (see below), whose sum is σ = 62333880. Its totient is φ = 51944880.

The previous prime is 57139373. The next prime is 57139421. The reversal of 57139379 is 97393175.

57139379 is nontrivially palindromic in base 13.

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 57139379 - 28 = 57139123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57139373) 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, 2597234 + ... + 2597255.

It is an arithmetic number, because the mean of its divisors is an integer number (15583470).

Almost surely, 257139379 is an apocalyptic number.

57139379 is a deficient number, since it is larger than the sum of its proper divisors (5194501).

57139379 is a wasteful number, since it uses less digits than its factorization.

57139379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5194500.

The product of its digits is 178605, while the sum is 44.

The square root of 57139379 is about 7559.0593991581. The cubic root of 57139379 is about 385.1635421464.

The spelling of 57139379 in words is "fifty-seven million, one hundred thirty-nine thousand, three hundred seventy-nine".

Divisors: 1 11 5194489 57139379