442731006391 has 4 divisors (see below), whose sum is σ = 444414394512. Its totient is φ = 441047618272.

The previous prime is 442731006379. The next prime is 442731006407. The reversal of 442731006391 is 193600137244.

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 442731006391 - 2¹¹ = 442731004343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442731006491) 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, 841693666 + ... + 841694191.

It is an arithmetic number, because the mean of its divisors is an integer number (111103598628).

Almost surely, 2^442731006391 is an apocalyptic number.

442731006391 is a deficient number, since it is larger than the sum of its proper divisors (1683388121).

442731006391 is a wasteful number, since it uses less digits than its factorization.

442731006391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1683388120.

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

The spelling of 442731006391 in words is "four hundred forty-two billion, seven hundred thirty-one million, six thousand, three hundred ninety-one".