57278629 has 2 divisors, whose sum is σ = 57278630. Its totient is φ = 57278628.

The previous prime is 57278621. The next prime is 57278653. The reversal of 57278629 is 92687275.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47637604 + 9641025 = 6902^2 + 3105^2 .

It is a cyclic number.

It is not a de Polignac number, because 57278629 - 2³ = 57278621 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57278621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28639314 + 28639315.

It is an arithmetic number, because the mean of its divisors is an integer number (28639315).

Almost surely, 2^57278629 is an apocalyptic number.

It is an amenable number.

57278629 is a deficient number, since it is larger than the sum of its proper divisors (1).

57278629 is an equidigital number, since it uses as much as digits as its factorization.

57278629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 46.

The square root of 57278629 is about 7568.2645963259. The cubic root of 57278629 is about 385.4761725014.

The spelling of 57278629 in words is "fifty-seven million, two hundred seventy-eight thousand, six hundred twenty-nine".