44400400397 has 2 divisors, whose sum is σ = 44400400398. Its totient is φ = 44400400396.

The previous prime is 44400400357. The next prime is 44400400417. The reversal of 44400400397 is 79300400444.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30770071396 + 13630329001 = 175414^2 + 116749^2 .

It is a cyclic number.

It is not a de Polignac number, because 44400400397 - 2⁶ = 44400400333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44400400327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22200200198 + 22200200199.

It is an arithmetic number, because the mean of its divisors is an integer number (22200200199).

Almost surely, 2^44400400397 is an apocalyptic number.

It is an amenable number.

44400400397 is a deficient number, since it is larger than the sum of its proper divisors (1).

44400400397 is an equidigital number, since it uses as much as digits as its factorization.

44400400397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 35.

The spelling of 44400400397 in words is "forty-four billion, four hundred million, four hundred thousand, three hundred ninety-seven".