56129899 has 4 divisors (see below), whose sum is σ = 64148464. Its totient is φ = 48111336.

The previous prime is 56129893. The next prime is 56129911. The reversal of 56129899 is 99892165.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 56129899 - 2¹³ = 56121707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56129893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4009272 + ... + 4009285.

It is an arithmetic number, because the mean of its divisors is an integer number (16037116).

Almost surely, 2^56129899 is an apocalyptic number.

56129899 is a deficient number, since it is larger than the sum of its proper divisors (8018565).

56129899 is an equidigital number, since it uses as much as digits as its factorization.

56129899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8018564.

The product of its digits is 349920, while the sum is 49.

The square root of 56129899 is about 7491.9889882460. The cubic root of 56129899 is about 382.8818269855.

The spelling of 56129899 in words is "fifty-six million, one hundred twenty-nine thousand, eight hundred ninety-nine".