55089491 has 2 divisors, whose sum is σ = 55089492. Its totient is φ = 55089490.

The previous prime is 55089457. The next prime is 55089497. The reversal of 55089491 is 19498055.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55089491 - 2⁶ = 55089427 is a prime.

It is not a weakly prime, because it can be changed into another prime (55089497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27544745 + 27544746.

It is an arithmetic number, because the mean of its divisors is an integer number (27544746).

Almost surely, 2^55089491 is an apocalyptic number.

55089491 is a deficient number, since it is larger than the sum of its proper divisors (1).

55089491 is an equidigital number, since it uses as much as digits as its factorization.

55089491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 55089491 is about 7422.2295167961. The cubic root of 55089491 is about 380.5013949250.

The spelling of 55089491 in words is "fifty-five million, eighty-nine thousand, four hundred ninety-one".