444672421 has 2 divisors, whose sum is σ = 444672422. Its totient is φ = 444672420.

The previous prime is 444672413. The next prime is 444672427. The reversal of 444672421 is 124276444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 402604225 + 42068196 = 20065^2 + 6486^2 .

It is a cyclic number.

It is not a de Polignac number, because 444672421 - 2³ = 444672413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (444672427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222336210 + 222336211.

It is an arithmetic number, because the mean of its divisors is an integer number (222336211).

Almost surely, 2^444672421 is an apocalyptic number.

It is an amenable number.

444672421 is a deficient number, since it is larger than the sum of its proper divisors (1).

444672421 is an equidigital number, since it uses as much as digits as its factorization.

444672421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43008, while the sum is 34.

The square root of 444672421 is about 21087.2573133634. The cubic root of 444672421 is about 763.2732900698.

It can be divided in two parts, 4446 and 72421, that added together give a palindrome (76867).

The spelling of 444672421 in words is "four hundred forty-four million, six hundred seventy-two thousand, four hundred twenty-one".