55657839 has 8 divisors (see below), whose sum is σ = 74777472. Its totient is φ = 36821720.

The previous prime is 55657837. The next prime is 55657937. The reversal of 55657839 is 93875655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55657839 - 2¹ = 55657837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55657831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70419 + ... + 71204.

It is an arithmetic number, because the mean of its divisors is an integer number (9347184).

Almost surely, 2^55657839 is an apocalyptic number.

55657839 is a deficient number, since it is larger than the sum of its proper divisors (19119633).

55657839 is a wasteful number, since it uses less digits than its factorization.

55657839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141757.

The product of its digits is 1134000, while the sum is 48.

The square root of 55657839 is about 7460.4181518196. The cubic root of 55657839 is about 381.8054412518.

The spelling of 55657839 in words is "fifty-five million, six hundred fifty-seven thousand, eight hundred thirty-nine".