57139741 has 2 divisors, whose sum is σ = 57139742. Its totient is φ = 57139740.

The previous prime is 57139699. The next prime is 57139763. The reversal of 57139741 is 14793175.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46867716 + 10272025 = 6846^2 + 3205^2 .

It is a cyclic number.

It is not a de Polignac number, because 57139741 - 2¹³ = 57131549 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57139741.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57139781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28569870 + 28569871.

It is an arithmetic number, because the mean of its divisors is an integer number (28569871).

Almost surely, 2^57139741 is an apocalyptic number.

57139741 is the 4041-st centered heptagonal number.

It is an amenable number.

57139741 is a deficient number, since it is larger than the sum of its proper divisors (1).

57139741 is an equidigital number, since it uses as much as digits as its factorization.

57139741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26460, while the sum is 37.

The square root of 57139741 is about 7559.0833438983. The cubic root of 57139741 is about 385.1643555312.

The spelling of 57139741 in words is "fifty-seven million, one hundred thirty-nine thousand, seven hundred forty-one".