55890073 has 4 divisors (see below), whose sum is σ = 55918800. Its totient is φ = 55861348.

The previous prime is 55890071. The next prime is 55890089. The reversal of 55890073 is 37009855.

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: 37009855 = 5 ⋅7401971.

It is a cyclic number.

It is not a de Polignac number, because 55890073 - 2¹ = 55890071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55890071) 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, 11215 + ... + 15412.

It is an arithmetic number, because the mean of its divisors is an integer number (13979700).

Almost surely, 2^55890073 is an apocalyptic number.

It is an amenable number.

55890073 is a deficient number, since it is larger than the sum of its proper divisors (28727).

55890073 is a wasteful number, since it uses less digits than its factorization.

55890073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28726.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 55890073 is about 7475.9663589398. The cubic root of 55890073 is about 382.3357359233.

The spelling of 55890073 in words is "fifty-five million, eight hundred ninety thousand, seventy-three".