442072399 has 2 divisors, whose sum is σ = 442072400. Its totient is φ = 442072398.

The previous prime is 442072381. The next prime is 442072439. The reversal of 442072399 is 993270244.

It is an a-pointer prime, because the next prime (442072439) can be obtained adding 442072399 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 442072399 - 2²⁷ = 307854671 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 (442072339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221036199 + 221036200.

It is an arithmetic number, because the mean of its divisors is an integer number (221036200).

Almost surely, 2^442072399 is an apocalyptic number.

442072399 is a deficient number, since it is larger than the sum of its proper divisors (1).

442072399 is an equidigital number, since it uses as much as digits as its factorization.

442072399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 442072399 is about 21025.5178057521. The cubic root of 442072399 is about 761.7827487614.

The spelling of 442072399 in words is "four hundred forty-two million, seventy-two thousand, three hundred ninety-nine".