56020403 has 2 divisors, whose sum is σ = 56020404. Its totient is φ = 56020402.

The previous prime is 56020399. The next prime is 56020409. The reversal of 56020403 is 30402065.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56020403 - 2² = 56020399 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (56020409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28010201 + 28010202.

It is an arithmetic number, because the mean of its divisors is an integer number (28010202).

Almost surely, 2^56020403 is an apocalyptic number.

56020403 is a deficient number, since it is larger than the sum of its proper divisors (1).

56020403 is an equidigital number, since it uses as much as digits as its factorization.

56020403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 56020403 is about 7484.6778821804. The cubic root of 56020403 is about 382.6326946448.

Adding to 56020403 its reverse (30402065), we get a palindrome (86422468).

The spelling of 56020403 in words is "fifty-six million, twenty thousand, four hundred three".