309438893711 has 2 divisors, whose sum is σ = 309438893712. Its totient is φ = 309438893710.

The previous prime is 309438893681. The next prime is 309438893779. The reversal of 309438893711 is 117398834903.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 309438893711 - 2¹⁴ = 309438877327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (309438803711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154719446855 + 154719446856.

It is an arithmetic number, because the mean of its divisors is an integer number (154719446856).

Almost surely, 2^309438893711 is an apocalyptic number.

309438893711 is a deficient number, since it is larger than the sum of its proper divisors (1).

309438893711 is an equidigital number, since it uses as much as digits as its factorization.

309438893711 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3919104, while the sum is 56.

The spelling of 309438893711 in words is "three hundred nine billion, four hundred thirty-eight million, eight hundred ninety-three thousand, seven hundred eleven".