55975747 has 4 divisors (see below), whose sum is σ = 59268456. Its totient is φ = 52683040.

The previous prime is 55975727. The next prime is 55975757. The reversal of 55975747 is 74757955.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55975747 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55975747.

It is not an unprimeable number, because it can be changed into a prime (55975727) 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, 1646329 + ... + 1646362.

It is an arithmetic number, because the mean of its divisors is an integer number (14817114).

Almost surely, 2^55975747 is an apocalyptic number.

55975747 is a deficient number, since it is larger than the sum of its proper divisors (3292709).

55975747 is a wasteful number, since it uses less digits than its factorization.

55975747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3292708.

The product of its digits is 1543500, while the sum is 49.

The square root of 55975747 is about 7481.6941263326. The cubic root of 55975747 is about 382.5309972459.

The spelling of 55975747 in words is "fifty-five million, nine hundred seventy-five thousand, seven hundred forty-seven".