42999911 has 2 divisors, whose sum is σ = 42999912. Its totient is φ = 42999910.

The previous prime is 42999881. The next prime is 42999923. The reversal of 42999911 is 11999924.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42999911 - 2¹⁰ = 42998887 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42999311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21499955 + 21499956.

It is an arithmetic number, because the mean of its divisors is an integer number (21499956).

Almost surely, 2^42999911 is an apocalyptic number.

42999911 is a deficient number, since it is larger than the sum of its proper divisors (1).

42999911 is an equidigital number, since it uses as much as digits as its factorization.

42999911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52488, while the sum is 44.

The square root of 42999911 is about 6557.4317381121. The cubic root of 42999911 is about 350.3395643312.

The spelling of 42999911 in words is "forty-two million, nine hundred ninety-nine thousand, nine hundred eleven".