55697933 has 4 divisors (see below), whose sum is σ = 58974300. Its totient is φ = 52421568.

The previous prime is 55697903. The next prime is 55697959. The reversal of 55697933 is 33979655.

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 20675209 + 35022724 = 4547^2 + 5918^2 .

It is a cyclic number.

It is not a de Polignac number, because 55697933 - 2¹⁶ = 55632397 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 (55697903) 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, 1638158 + ... + 1638191.

It is an arithmetic number, because the mean of its divisors is an integer number (14743575).

Almost surely, 2^55697933 is an apocalyptic number.

It is an amenable number.

55697933 is a deficient number, since it is larger than the sum of its proper divisors (3276367).

55697933 is a wasteful number, since it uses less digits than its factorization.

55697933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3276366.

The product of its digits is 765450, while the sum is 47.

The square root of 55697933 is about 7463.1047828635. The cubic root of 55697933 is about 381.8970990985.

It can be divided in two parts, 556 and 97933, that added together give a palindrome (98489).

The spelling of 55697933 in words is "fifty-five million, six hundred ninety-seven thousand, nine hundred thirty-three".