56439403 has 2 divisors, whose sum is σ = 56439404. Its totient is φ = 56439402.

The previous prime is 56439389. The next prime is 56439413. The reversal of 56439403 is 30493465.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56439403 is a prime.

It is equal to p_3362947 and since 56439403 and 3362947 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (56439413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28219701 + 28219702.

It is an arithmetic number, because the mean of its divisors is an integer number (28219702).

Almost surely, 2^56439403 is an apocalyptic number.

56439403 is a deficient number, since it is larger than the sum of its proper divisors (1).

56439403 is an equidigital number, since it uses as much as digits as its factorization.

56439403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 56439403 is about 7512.6162553401. The cubic root of 56439403 is about 383.5842827289.

The spelling of 56439403 in words is "fifty-six million, four hundred thirty-nine thousand, four hundred three".