57148769 has 4 divisors (see below), whose sum is σ = 57790980. Its totient is φ = 56506560.

The previous prime is 57148753. The next prime is 57148783. The reversal of 57148769 is 96784175.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31494544 + 25654225 = 5612^2 + 5065^2 .

It is a cyclic number.

It is not a de Polignac number, because 57148769 - 2⁴ = 57148753 is a prime.

It is a super-2 number, since 2×57148769² = 6531963596430722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (57148709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320972 + ... + 321149.

It is an arithmetic number, because the mean of its divisors is an integer number (14447745).

Almost surely, 2^57148769 is an apocalyptic number.

It is an amenable number.

57148769 is a deficient number, since it is larger than the sum of its proper divisors (642211).

57148769 is an equidigital number, since it uses as much as digits as its factorization.

57148769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642210.

The product of its digits is 423360, while the sum is 47.

The square root of 57148769 is about 7559.6804826659. The cubic root of 57148769 is about 385.1846396080.

The spelling of 57148769 in words is "fifty-seven million, one hundred forty-eight thousand, seven hundred sixty-nine".