55395947 has 4 divisors (see below), whose sum is σ = 55433040. Its totient is φ = 55358856.

The previous prime is 55395941. The next prime is 55395959. The reversal of 55395947 is 74959355.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74959355 = 5 ⋅14991871.

It is a cyclic number.

It is not a de Polignac number, because 55395947 - 2⁴ = 55395931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55395941) 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, 16208 + ... + 19325.

It is an arithmetic number, because the mean of its divisors is an integer number (13858260).

Almost surely, 2^55395947 is an apocalyptic number.

55395947 is a deficient number, since it is larger than the sum of its proper divisors (37093).

55395947 is a wasteful number, since it uses less digits than its factorization.

55395947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37092.

The product of its digits is 850500, while the sum is 47.

The square root of 55395947 is about 7442.8453564480. The cubic root of 55395947 is about 381.2056513136.

The spelling of 55395947 in words is "fifty-five million, three hundred ninety-five thousand, nine hundred forty-seven".