55397603 has 4 divisors (see below), whose sum is σ = 56065128. Its totient is φ = 54730080.

The previous prime is 55397599. The next prime is 55397609. The reversal of 55397603 is 30679355.

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 55397603 - 2² = 55397599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55397609) 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, 333638 + ... + 333803.

It is an arithmetic number, because the mean of its divisors is an integer number (14016282).

Almost surely, 2^55397603 is an apocalyptic number.

55397603 is a deficient number, since it is larger than the sum of its proper divisors (667525).

55397603 is an equidigital number, since it uses as much as digits as its factorization.

55397603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667524.

The product of its (nonzero) digits is 85050, while the sum is 38.

The square root of 55397603 is about 7442.9566033936. The cubic root of 55397603 is about 381.2094498483.

The spelling of 55397603 in words is "fifty-five million, three hundred ninety-seven thousand, six hundred three".