444240631 has 2 divisors, whose sum is σ = 444240632. Its totient is φ = 444240630.

The previous prime is 444240593. The next prime is 444240649. The reversal of 444240631 is 136042444.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 444240631 - 2²³ = 435852023 is a prime.

It is a super-2 number, since 2×444240631² = 394699476462556322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 444240631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444240661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222120315 + 222120316.

It is an arithmetic number, because the mean of its divisors is an integer number (222120316).

Almost surely, 2^444240631 is an apocalyptic number.

444240631 is a deficient number, since it is larger than the sum of its proper divisors (1).

444240631 is an equidigital number, since it uses as much as digits as its factorization.

444240631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 444240631 is about 21077.0166532173. The cubic root of 444240631 is about 763.0261564563.

The spelling of 444240631 in words is "four hundred forty-four million, two hundred forty thousand, six hundred thirty-one".