57143969 has 2 divisors, whose sum is σ = 57143970. Its totient is φ = 57143968.

The previous prime is 57143959. The next prime is 57143971. The reversal of 57143969 is 96934175.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53831569 + 3312400 = 7337^2 + 1820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57143969 is a prime.

It is a super-2 number, since 2×57143969² = 6530866386145922, which contains 22 as substring.

Together with 57143971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57143909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28571984 + 28571985.

It is an arithmetic number, because the mean of its divisors is an integer number (28571985).

Almost surely, 2^57143969 is an apocalyptic number.

It is an amenable number.

57143969 is a deficient number, since it is larger than the sum of its proper divisors (1).

57143969 is an equidigital number, since it uses as much as digits as its factorization.

57143969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 44.

The square root of 57143969 is about 7559.3630022641. The cubic root of 57143969 is about 385.1738552519.

The spelling of 57143969 in words is "fifty-seven million, one hundred forty-three thousand, nine hundred sixty-nine".