444154421 has 2 divisors, whose sum is σ = 444154422. Its totient is φ = 444154420.

The previous prime is 444154397. The next prime is 444154429. The reversal of 444154421 is 124451444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 333610225 + 110544196 = 18265^2 + 10514^2 .

It is a cyclic number.

It is not a de Polignac number, because 444154421 - 2¹⁸ = 443892277 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 (444154429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222077210 + 222077211.

It is an arithmetic number, because the mean of its divisors is an integer number (222077211).

Almost surely, 2^444154421 is an apocalyptic number.

It is an amenable number.

444154421 is a deficient number, since it is larger than the sum of its proper divisors (1).

444154421 is an equidigital number, since it uses as much as digits as its factorization.

444154421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10240, while the sum is 29.

The square root of 444154421 is about 21074.9714353306. The cubic root of 444154421 is about 762.9767952648.

The spelling of 444154421 in words is "four hundred forty-four million, one hundred fifty-four thousand, four hundred twenty-one".