55697039 has 4 divisors (see below), whose sum is σ = 55865640. Its totient is φ = 55528440.

The previous prime is 55696973. The next prime is 55697041. The reversal of 55697039 is 93079655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93079655 = 5 ⋅18615931.

It is a cyclic number.

It is not a de Polignac number, because 55697039 - 2¹² = 55692943 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 (55697069) 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, 83804 + ... + 84465.

It is an arithmetic number, because the mean of its divisors is an integer number (13966410).

Almost surely, 2^55697039 is an apocalyptic number.

55697039 is a deficient number, since it is larger than the sum of its proper divisors (168601).

55697039 is a wasteful number, since it uses less digits than its factorization.

55697039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168600.

The product of its (nonzero) digits is 255150, while the sum is 44.

The square root of 55697039 is about 7463.0448879797. The cubic root of 55697039 is about 381.8950558280.

The spelling of 55697039 in words is "fifty-five million, six hundred ninety-seven thousand, thirty-nine".