31012000289 has 2 divisors, whose sum is σ = 31012000290. Its totient is φ = 31012000288.

The previous prime is 31012000277. The next prime is 31012000381. The reversal of 31012000289 is 98200021013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19928121889 + 11083878400 = 141167^2 + 105280^2 .

It is a cyclic number.

It is not a de Polignac number, because 31012000289 - 2¹² = 31011996193 is a prime.

It is not a weakly prime, because it can be changed into another prime (31012000589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506000144 + 15506000145.

It is an arithmetic number, because the mean of its divisors is an integer number (15506000145).

Almost surely, 2^31012000289 is an apocalyptic number.

It is an amenable number.

31012000289 is a deficient number, since it is larger than the sum of its proper divisors (1).

31012000289 is an equidigital number, since it uses as much as digits as its factorization.

31012000289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 31012000289 in words is "thirty-one billion, twelve million, two hundred eighty-nine", and thus it is an aban number.