56445997 has 2 divisors, whose sum is σ = 56445998. Its totient is φ = 56445996.

The previous prime is 56445989. The next prime is 56446003. The reversal of 56445997 is 79954465.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28419561 + 28026436 = 5331^2 + 5294^2 .

It is a cyclic number.

It is not a de Polignac number, because 56445997 - 2³ = 56445989 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56445997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56445937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28222998 + 28222999.

It is an arithmetic number, because the mean of its divisors is an integer number (28222999).

Almost surely, 2^56445997 is an apocalyptic number.

It is an amenable number.

56445997 is a deficient number, since it is larger than the sum of its proper divisors (1).

56445997 is an equidigital number, since it uses as much as digits as its factorization.

56445997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1360800, while the sum is 49.

The square root of 56445997 is about 7513.0551042835. The cubic root of 56445997 is about 383.5992206159.

The spelling of 56445997 in words is "fifty-six million, four hundred forty-five thousand, nine hundred ninety-seven".