57299947 has 2 divisors, whose sum is σ = 57299948. Its totient is φ = 57299946.

The previous prime is 57299929. The next prime is 57299981. The reversal of 57299947 is 74999275.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57299947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 57299894 and 57299903.

It is not a weakly prime, because it can be changed into another prime (57296947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28649973 + 28649974.

It is an arithmetic number, because the mean of its divisors is an integer number (28649974).

Almost surely, 2^57299947 is an apocalyptic number.

57299947 is a deficient number, since it is larger than the sum of its proper divisors (1).

57299947 is an equidigital number, since it uses as much as digits as its factorization.

57299947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1428840, while the sum is 52.

The square root of 57299947 is about 7569.6728462992. The cubic root of 57299947 is about 385.5239888331.

It can be divided in two parts, 57299 and 947, that multiplied together give a triangular number (54262153 = T₁₀₄₁₇).

The spelling of 57299947 in words is "fifty-seven million, two hundred ninety-nine thousand, nine hundred forty-seven".