309134120693 has 2 divisors, whose sum is σ = 309134120694. Its totient is φ = 309134120692.

The previous prime is 309134120681. The next prime is 309134120717. The reversal of 309134120693 is 396021431903.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 308932537489 + 201583204 = 555817^2 + 14198^2 .

It is a cyclic number.

It is not a de Polignac number, because 309134120693 - 2⁴ = 309134120677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 309134120693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (309134120593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154567060346 + 154567060347.

It is an arithmetic number, because the mean of its divisors is an integer number (154567060347).

Almost surely, 2^309134120693 is an apocalyptic number.

It is an amenable number.

309134120693 is a deficient number, since it is larger than the sum of its proper divisors (1).

309134120693 is an equidigital number, since it uses as much as digits as its factorization.

309134120693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 41.

The spelling of 309134120693 in words is "three hundred nine billion, one hundred thirty-four million, one hundred twenty thousand, six hundred ninety-three".