55123967 has 4 divisors (see below), whose sum is σ = 56468496. Its totient is φ = 53779440.

The previous prime is 55123963. The next prime is 55123987. The reversal of 55123967 is 76932155.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55123967 - 2² = 55123963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55123967.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55123963) 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, 672203 + ... + 672284.

It is an arithmetic number, because the mean of its divisors is an integer number (14117124).

Almost surely, 2^55123967 is an apocalyptic number.

55123967 is a deficient number, since it is larger than the sum of its proper divisors (1344529).

55123967 is a wasteful number, since it uses less digits than its factorization.

55123967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344528.

The product of its digits is 56700, while the sum is 38.

The square root of 55123967 is about 7424.5516362943. The cubic root of 55123967 is about 380.5807532580.

The spelling of 55123967 in words is "fifty-five million, one hundred twenty-three thousand, nine hundred sixty-seven".