42044399 has 2 divisors, whose sum is σ = 42044400. Its totient is φ = 42044398.

The previous prime is 42044389. The next prime is 42044407. The reversal of 42044399 is 99344024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42044399 - 2²⁴ = 25267183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42044389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21022199 + 21022200.

It is an arithmetic number, because the mean of its divisors is an integer number (21022200).

Almost surely, 2^42044399 is an apocalyptic number.

42044399 is a deficient number, since it is larger than the sum of its proper divisors (1).

42044399 is an equidigital number, since it uses as much as digits as its factorization.

42044399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 42044399 is about 6484.1652508245. The cubic root of 42044399 is about 347.7251071525.

The spelling of 42044399 in words is "forty-two million, forty-four thousand, three hundred ninety-nine".