56742289 has 2 divisors, whose sum is σ = 56742290. Its totient is φ = 56742288.

The previous prime is 56742281. The next prime is 56742293. The reversal of 56742289 is 98224765.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55726225 + 1016064 = 7465^2 + 1008^2 .

It is a cyclic number.

It is not a de Polignac number, because 56742289 - 2³ = 56742281 is a prime.

It is not a weakly prime, because it can be changed into another prime (56742281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28371144 + 28371145.

It is an arithmetic number, because the mean of its divisors is an integer number (28371145).

Almost surely, 2^56742289 is an apocalyptic number.

It is an amenable number.

56742289 is a deficient number, since it is larger than the sum of its proper divisors (1).

56742289 is an equidigital number, since it uses as much as digits as its factorization.

56742289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 43.

The square root of 56742289 is about 7532.7477722276. The cubic root of 56742289 is about 384.2692361883.

The spelling of 56742289 in words is "fifty-six million, seven hundred forty-two thousand, two hundred eighty-nine".