55623369 has 4 divisors (see below), whose sum is σ = 74164496. Its totient is φ = 37082244.

The previous prime is 55623353. The next prime is 55623383. The reversal of 55623369 is 96332655.

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.

It is not a de Polignac number, because 55623369 - 2⁴ = 55623353 is a prime.

It is a super-2 number, since 2×55623369² = 6187918357820322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55623329) 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, 9270559 + ... + 9270564.

It is an arithmetic number, because the mean of its divisors is an integer number (18541124).

Almost surely, 2^55623369 is an apocalyptic number.

It is an amenable number.

55623369 is a deficient number, since it is larger than the sum of its proper divisors (18541127).

55623369 is a wasteful number, since it uses less digits than its factorization.

55623369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18541126.

The product of its digits is 145800, while the sum is 39.

The square root of 55623369 is about 7458.1076017982. The cubic root of 55623369 is about 381.7266050888.

The spelling of 55623369 in words is "fifty-five million, six hundred twenty-three thousand, three hundred sixty-nine".