442031397 has 4 divisors (see below), whose sum is σ = 589375200. Its totient is φ = 294687596.

The previous prime is 442031383. The next prime is 442031413. The reversal of 442031397 is 793130244.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 442031397 - 2¹⁵ = 441998629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442031327) 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, 73671897 + ... + 73671902.

It is an arithmetic number, because the mean of its divisors is an integer number (147343800).

Almost surely, 2^442031397 is an apocalyptic number.

It is an amenable number.

442031397 is a deficient number, since it is larger than the sum of its proper divisors (147343803).

442031397 is a wasteful number, since it uses less digits than its factorization.

442031397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147343802.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 442031397 is about 21024.5427298669. The cubic root of 442031397 is about 761.7591963734.

The spelling of 442031397 in words is "four hundred forty-two million, thirty-one thousand, three hundred ninety-seven".