56403929 has 2 divisors, whose sum is σ = 56403930. Its totient is φ = 56403928.

The previous prime is 56403877. The next prime is 56403931. The reversal of 56403929 is 92930465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55472704 + 931225 = 7448^2 + 965^2 .

It is a cyclic number.

It is not a de Polignac number, because 56403929 - 2¹⁶ = 56338393 is a prime.

It is a Sophie Germain prime.

Together with 56403931, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 56403892 and 56403901.

It is not a weakly prime, because it can be changed into another prime (56403979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28201964 + 28201965.

It is an arithmetic number, because the mean of its divisors is an integer number (28201965).

Almost surely, 2^56403929 is an apocalyptic number.

It is an amenable number.

56403929 is a deficient number, since it is larger than the sum of its proper divisors (1).

56403929 is an equidigital number, since it uses as much as digits as its factorization.

56403929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 56403929 is about 7510.2549224377. The cubic root of 56403929 is about 383.5039008208.

The spelling of 56403929 in words is "fifty-six million, four hundred three thousand, nine hundred twenty-nine".