42999899 has 4 divisors (see below), whose sum is σ = 43076040. Its totient is φ = 42923760.

The previous prime is 42999881. The next prime is 42999911. The reversal of 42999899 is 99899924.

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

It is a cyclic number.

It is not a de Polignac number, because 42999899 - 2⁸ = 42999643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42999829) 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, 37217 + ... + 38354.

It is an arithmetic number, because the mean of its divisors is an integer number (10769010).

Almost surely, 2^42999899 is an apocalyptic number.

42999899 is a deficient number, since it is larger than the sum of its proper divisors (76141).

42999899 is an equidigital number, since it uses as much as digits as its factorization.

42999899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76140.

The product of its digits is 3779136, while the sum is 59.

The square root of 42999899 is about 6557.4308231197. The cubic root of 42999899 is about 350.3395317414.

The spelling of 42999899 in words is "forty-two million, nine hundred ninety-nine thousand, eight hundred ninety-nine".