55949913 has 16 divisors (see below), whose sum is σ = 83403840. Its totient is φ = 37068192.

The previous prime is 55949911. The next prime is 55949921. The reversal of 55949913 is 31994955.

It is a happy number.

55949913 is a `hidden beast` number, since 559 + 4 + 9 + 91 + 3 = 666.

It is not a de Polignac number, because 55949913 - 2¹ = 55949911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55949911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1956 + ... + 10757.

It is an arithmetic number, because the mean of its divisors is an integer number (5212740).

Almost surely, 2^55949913 is an apocalyptic number.

It is an amenable number.

55949913 is a deficient number, since it is larger than the sum of its proper divisors (27453927).

55949913 is a wasteful number, since it uses less digits than its factorization.

55949913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12885 (or 12879 counting only the distinct ones).

The product of its digits is 218700, while the sum is 45.

The square root of 55949913 is about 7479.9674464532. The cubic root of 55949913 is about 382.4721394548.

The spelling of 55949913 in words is "fifty-five million, nine hundred forty-nine thousand, nine hundred thirteen".