57381869 has 4 divisors (see below), whose sum is σ = 58167996. Its totient is φ = 56595744.

The previous prime is 57381847. The next prime is 57381893. The reversal of 57381869 is 96818375.

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 35880100 + 21501769 = 5990^2 + 4637^2 .

It is a cyclic number.

It is not a de Polignac number, because 57381869 - 2¹² = 57377773 is a prime.

It is a super-2 number, since 2×57381869² = 6585357779866322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57381839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392954 + ... + 393099.

It is an arithmetic number, because the mean of its divisors is an integer number (14541999).

Almost surely, 2^57381869 is an apocalyptic number.

It is an amenable number.

57381869 is a deficient number, since it is larger than the sum of its proper divisors (786127).

57381869 is an equidigital number, since it uses as much as digits as its factorization.

57381869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786126.

The product of its digits is 362880, while the sum is 47.

The square root of 57381869 is about 7575.0821117662. The cubic root of 57381869 is about 385.7076298218.

The spelling of 57381869 in words is "fifty-seven million, three hundred eighty-one thousand, eight hundred sixty-nine".