57079381 has 2 divisors, whose sum is σ = 57079382. Its totient is φ = 57079380.

The previous prime is 57079343. The next prime is 57079397. The reversal of 57079381 is 18397075.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47679025 + 9400356 = 6905^2 + 3066^2 .

It is a cyclic number.

It is not a de Polignac number, because 57079381 - 2¹¹ = 57077333 is a prime.

It is a super-2 number, since 2×57079381² = 6516111470686322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57079301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28539690 + 28539691.

It is an arithmetic number, because the mean of its divisors is an integer number (28539691).

Almost surely, 2^57079381 is an apocalyptic number.

It is an amenable number.

57079381 is a deficient number, since it is larger than the sum of its proper divisors (1).

57079381 is an equidigital number, since it uses as much as digits as its factorization.

57079381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 57079381 is about 7555.0897413598. The cubic root of 57079381 is about 385.0286839820.

The spelling of 57079381 in words is "fifty-seven million, seventy-nine thousand, three hundred eighty-one".