57148009 has 4 divisors (see below), whose sum is σ = 59118660. Its totient is φ = 55177360.

The previous prime is 57147983. The next prime is 57148019. The reversal of 57148009 is 90084175.

It is a happy number.

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 21483225 + 35664784 = 4635^2 + 5972^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57148009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57148019) 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, 985282 + ... + 985339.

It is an arithmetic number, because the mean of its divisors is an integer number (14779665).

Almost surely, 2^57148009 is an apocalyptic number.

It is an amenable number.

57148009 is a deficient number, since it is larger than the sum of its proper divisors (1970651).

57148009 is a wasteful number, since it uses less digits than its factorization.

57148009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970650.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 57148009 is about 7559.6302158241. The cubic root of 57148009 is about 385.1829321252.

The spelling of 57148009 in words is "fifty-seven million, one hundred forty-eight thousand, nine".