1400444431 has 2 divisors, whose sum is σ = 1400444432. Its totient is φ = 1400444430.

The previous prime is 1400444393. The next prime is 1400444443. The reversal of 1400444431 is 1344440041.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1400444431 is a prime.

It is a super-2 number, since 2×1400444431² = 3922489208637827522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1400444396 and 1400444405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1400444471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700222215 + 700222216.

It is an arithmetic number, because the mean of its divisors is an integer number (700222216).

Almost surely, 2^1400444431 is an apocalyptic number.

1400444431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1400444431 is an equidigital number, since it uses as much as digits as its factorization.

1400444431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 1400444431 is about 37422.5123555327. The cubic root of 1400444431 is about 1118.8073057586.

Adding to 1400444431 its reverse (1344440041), we get a palindrome (2744884472).

The spelling of 1400444431 in words is "one billion, four hundred million, four hundred forty-four thousand, four hundred thirty-one".