55497903 has 4 divisors (see below), whose sum is σ = 73997208. Its totient is φ = 36998600.

The previous prime is 55497899. The next prime is 55497947. The reversal of 55497903 is 30979455.

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 55497903 - 2² = 55497899 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55497103) 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, 9249648 + ... + 9249653.

It is an arithmetic number, because the mean of its divisors is an integer number (18499302).

Almost surely, 2^55497903 is an apocalyptic number.

55497903 is a deficient number, since it is larger than the sum of its proper divisors (18499305).

55497903 is a wasteful number, since it uses less digits than its factorization.

55497903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18499304.

The product of its (nonzero) digits is 170100, while the sum is 42.

The square root of 55497903 is about 7449.6914701214. The cubic root of 55497903 is about 381.4393770973.

The spelling of 55497903 in words is "fifty-five million, four hundred ninety-seven thousand, nine hundred three".