31403763449 has 2 divisors, whose sum is σ = 31403763450. Its totient is φ = 31403763448.

The previous prime is 31403763439. The next prime is 31403763473. The reversal of 31403763449 is 94436730413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28024434025 + 3379329424 = 167405^2 + 58132^2 .

It is a cyclic number.

It is not a de Polignac number, because 31403763449 - 2¹² = 31403759353 is a prime.

It is not a weakly prime, because it can be changed into another prime (31403763439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15701881724 + 15701881725.

It is an arithmetic number, because the mean of its divisors is an integer number (15701881725).

Almost surely, 2^31403763449 is an apocalyptic number.

It is an amenable number.

31403763449 is a deficient number, since it is larger than the sum of its proper divisors (1).

31403763449 is an equidigital number, since it uses as much as digits as its factorization.

31403763449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 44.

The spelling of 31403763449 in words is "thirty-one billion, four hundred three million, seven hundred sixty-three thousand, four hundred forty-nine".