55891937 has 4 divisors (see below), whose sum is σ = 59179716. Its totient is φ = 52604160.

The previous prime is 55891933. The next prime is 55891943. The reversal of 55891937 is 73919855.

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 37650496 + 18241441 = 6136^2 + 4271^2 .

It is a cyclic number.

It is not a de Polignac number, because 55891937 - 2² = 55891933 is a prime.

It is a super-2 number, since 2×55891937² = 6247817243223938, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55891891 and 55891900.

It is not an unprimeable number, because it can be changed into a prime (55891931) 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, 1643864 + ... + 1643897.

It is an arithmetic number, because the mean of its divisors is an integer number (14794929).

Almost surely, 2^55891937 is an apocalyptic number.

It is an amenable number.

55891937 is a deficient number, since it is larger than the sum of its proper divisors (3287779).

55891937 is a wasteful number, since it uses less digits than its factorization.

55891937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3287778.

The product of its digits is 340200, while the sum is 47.

The square root of 55891937 is about 7476.0910240580. The cubic root of 55891937 is about 382.3399863257.

The spelling of 55891937 in words is "fifty-five million, eight hundred ninety-one thousand, nine hundred thirty-seven".