31289163469 has 2 divisors, whose sum is σ = 31289163470. Its totient is φ = 31289163468.

The previous prime is 31289163461. The next prime is 31289163509. The reversal of 31289163469 is 96436198213.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29125518244 + 2163645225 = 170662^2 + 46515^2 .

It is a cyclic number.

It is not a de Polignac number, because 31289163469 - 2³ = 31289163461 is a prime.

It is a super-2 number, since 2×31289163469² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31289163461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15644581734 + 15644581735.

It is an arithmetic number, because the mean of its divisors is an integer number (15644581735).

Almost surely, 2^31289163469 is an apocalyptic number.

It is an amenable number.

31289163469 is a deficient number, since it is larger than the sum of its proper divisors (1).

31289163469 is an equidigital number, since it uses as much as digits as its factorization.

31289163469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1679616, while the sum is 52.

The spelling of 31289163469 in words is "thirty-one billion, two hundred eighty-nine million, one hundred sixty-three thousand, four hundred sixty-nine".