55939699 has 4 divisors (see below), whose sum is σ = 56229736. Its totient is φ = 55649664.

The previous prime is 55939661. The next prime is 55939711. The reversal of 55939699 is 99693955.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99693955 = 5 ⋅19938791.

It is a cyclic number.

It is not a de Polignac number, because 55939699 - 2⁹ = 55939187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55939619) 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, 144729 + ... + 145114.

It is an arithmetic number, because the mean of its divisors is an integer number (14057434).

Almost surely, 2^55939699 is an apocalyptic number.

55939699 is a deficient number, since it is larger than the sum of its proper divisors (290037).

55939699 is a wasteful number, since it uses less digits than its factorization.

55939699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290036.

The product of its digits is 2952450, while the sum is 55.

The square root of 55939699 is about 7479.2846583079. The cubic root of 55939699 is about 382.4488638262.

The spelling of 55939699 in words is "fifty-five million, nine hundred thirty-nine thousand, six hundred ninety-nine".