55594991 has 2 divisors, whose sum is σ = 55594992. Its totient is φ = 55594990.

The previous prime is 55594951. The next prime is 55594999. The reversal of 55594991 is 19949555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55594991 - 2⁶ = 55594927 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55594999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27797495 + 27797496.

It is an arithmetic number, because the mean of its divisors is an integer number (27797496).

Almost surely, 2^55594991 is an apocalyptic number.

55594991 is a deficient number, since it is larger than the sum of its proper divisors (1).

55594991 is an equidigital number, since it uses as much as digits as its factorization.

55594991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 364500, while the sum is 47.

The square root of 55594991 is about 7456.2048657477. The cubic root of 55594991 is about 381.6616774602.

The spelling of 55594991 in words is "fifty-five million, five hundred ninety-four thousand, nine hundred ninety-one".