1244400431 has 2 divisors, whose sum is σ = 1244400432. Its totient is φ = 1244400430.

The previous prime is 1244400407. The next prime is 1244400449. The reversal of 1244400431 is 1340044421.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1244400431 - 2²² = 1240206127 is a prime.

It is a super-2 number, since 2×1244400431² = 3097064865345971522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1244400397 and 1244400406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1244400461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622200215 + 622200216.

It is an arithmetic number, because the mean of its divisors is an integer number (622200216).

Almost surely, 2^1244400431 is an apocalyptic number.

1244400431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244400431 is an equidigital number, since it uses as much as digits as its factorization.

1244400431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1244400431 is about 35276.0603100743. The cubic root of 1244400431 is about 1075.6064163873.

Adding to 1244400431 its reverse (1340044421), we get a palindrome (2584444852).

The spelling of 1244400431 in words is "one billion, two hundred forty-four million, four hundred thousand, four hundred thirty-one".