307920931289 has 2 divisors, whose sum is σ = 307920931290. Its totient is φ = 307920931288.

The previous prime is 307920931243. The next prime is 307920931349. The reversal of 307920931289 is 982139029703.

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., 180323376025 + 127597555264 = 424645^2 + 357208^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-307920931289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 307920931289.

It is not a weakly prime, because it can be changed into another prime (307920931229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153960465644 + 153960465645.

It is an arithmetic number, because the mean of its divisors is an integer number (153960465645).

Almost surely, 2^307920931289 is an apocalyptic number.

It is an amenable number.

307920931289 is a deficient number, since it is larger than the sum of its proper divisors (1).

307920931289 is an equidigital number, since it uses as much as digits as its factorization.

307920931289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1469664, while the sum is 53.

The spelling of 307920931289 in words is "three hundred seven billion, nine hundred twenty million, nine hundred thirty-one thousand, two hundred eighty-nine".