56642099 has 4 divisors (see below), whose sum is σ = 57570720. Its totient is φ = 55713480.

The previous prime is 56642093. The next prime is 56642141. The reversal of 56642099 is 99024665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99024665 = 5 ⋅19804933.

It is a cyclic number.

It is not a de Polignac number, because 56642099 - 2¹² = 56638003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56642093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464219 + ... + 464340.

It is an arithmetic number, because the mean of its divisors is an integer number (14392680).

Almost surely, 2^56642099 is an apocalyptic number.

56642099 is a deficient number, since it is larger than the sum of its proper divisors (928621).

56642099 is an equidigital number, since it uses as much as digits as its factorization.

56642099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928620.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 56642099 is about 7526.0945383379. The cubic root of 56642099 is about 384.0429345621.

The spelling of 56642099 in words is "fifty-six million, six hundred forty-two thousand, ninety-nine".