57409447 has 2 divisors, whose sum is σ = 57409448. Its totient is φ = 57409446.

The previous prime is 57409421. The next prime is 57409487. The reversal of 57409447 is 74490475.

57409447 is nontrivially palindromic in base 4.

It is an a-pointer prime, because the next prime (57409487) can be obtained adding 57409447 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57409447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57409487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28704723 + 28704724.

It is an arithmetic number, because the mean of its divisors is an integer number (28704724).

Almost surely, 2^57409447 is an apocalyptic number.

57409447 is a deficient number, since it is larger than the sum of its proper divisors (1).

57409447 is an equidigital number, since it uses as much as digits as its factorization.

57409447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 57409447 is about 7576.9022034074. The cubic root of 57409447 is about 385.7694109011.

The spelling of 57409447 in words is "fifty-seven million, four hundred nine thousand, four hundred forty-seven".