55977917 has 8 divisors (see below), whose sum is σ = 58368000. Its totient is φ = 53618544.

The previous prime is 55977877. The next prime is 55977919. The reversal of 55977917 is 71977955.

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 55977917 - 2⁶ = 55977853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55977919) 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, 3917 + ... + 11282.

It is an arithmetic number, because the mean of its divisors is an integer number (7296000).

Almost surely, 2^55977917 is an apocalyptic number.

It is an amenable number.

55977917 is a deficient number, since it is larger than the sum of its proper divisors (2390083).

55977917 is a wasteful number, since it uses less digits than its factorization.

55977917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15355.

The product of its digits is 694575, while the sum is 50.

The square root of 55977917 is about 7481.8391455577. The cubic root of 55977917 is about 382.5359403482.

The spelling of 55977917 in words is "fifty-five million, nine hundred seventy-seven thousand, nine hundred seventeen".