56090989 has 2 divisors, whose sum is σ = 56090990. Its totient is φ = 56090988.

The previous prime is 56090987. The next prime is 56090999. The reversal of 56090989 is 98909065.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55621764 + 469225 = 7458^2 + 685^2 .

It is a cyclic number.

It is not a de Polignac number, because 56090989 - 2¹ = 56090987 is a prime.

Together with 56090987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56090987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28045494 + 28045495.

It is an arithmetic number, because the mean of its divisors is an integer number (28045495).

Almost surely, 2^56090989 is an apocalyptic number.

It is an amenable number.

56090989 is a deficient number, since it is larger than the sum of its proper divisors (1).

56090989 is an equidigital number, since it uses as much as digits as its factorization.

56090989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 46.

The square root of 56090989 is about 7489.3917643558. The cubic root of 56090989 is about 382.7933335921.

The spelling of 56090989 in words is "fifty-six million, ninety thousand, nine hundred eighty-nine".