55691937 has 24 divisors (see below), whose sum is σ = 92761344. Its totient is φ = 31538304.

The previous prime is 55691927. The next prime is 55691939. The reversal of 55691937 is 73919655.

55691937 is a `hidden beast` number, since 556 + 9 + 1 + 93 + 7 = 666.

It is not a de Polignac number, because 55691937 - 2⁶ = 55691873 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55691892 and 55691901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55691939) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3208 + ... + 11030.

It is an arithmetic number, because the mean of its divisors is an integer number (3865056).

Almost surely, 2^55691937 is an apocalyptic number.

It is an amenable number.

55691937 is a deficient number, since it is larger than the sum of its proper divisors (37069407).

55691937 is a wasteful number, since it uses less digits than its factorization.

55691937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7949 (or 7946 counting only the distinct ones).

The product of its digits is 255150, while the sum is 45.

The square root of 55691937 is about 7462.7030625639. The cubic root of 55691937 is about 381.8833945973.

The spelling of 55691937 in words is "fifty-five million, six hundred ninety-one thousand, nine hundred thirty-seven".