55686953 has 4 divisors (see below), whose sum is σ = 63642240. Its totient is φ = 47731668.

The previous prime is 55686949. The next prime is 55686971. The reversal of 55686953 is 35968655.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35968655 = 5 ⋅7193731.

It is a cyclic number.

It is not a de Polignac number, because 55686953 - 2² = 55686949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55686898 and 55686907.

It is not an unprimeable number, because it can be changed into a prime (55686913) 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, 3977633 + ... + 3977646.

It is an arithmetic number, because the mean of its divisors is an integer number (15910560).

Almost surely, 2^55686953 is an apocalyptic number.

It is an amenable number.

55686953 is a deficient number, since it is larger than the sum of its proper divisors (7955287).

55686953 is an equidigital number, since it uses as much as digits as its factorization.

55686953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7955286.

The product of its digits is 972000, while the sum is 47.

The square root of 55686953 is about 7462.3691278307. The cubic root of 55686953 is about 381.8720023819.

It can be divided in two parts, 5568 and 6953, that added together give a palindrome (12521).

The spelling of 55686953 in words is "fifty-five million, six hundred eighty-six thousand, nine hundred fifty-three".