309673423 has 2 divisors, whose sum is σ = 309673424. Its totient is φ = 309673422.

The previous prime is 309673421. The next prime is 309673433. The reversal of 309673423 is 324376903.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 309673423 - 2¹ = 309673421 is a prime.

Together with 309673421, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (309673421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154836711 + 154836712.

It is an arithmetic number, because the mean of its divisors is an integer number (154836712).

Almost surely, 2^309673423 is an apocalyptic number.

309673423 is a deficient number, since it is larger than the sum of its proper divisors (1).

309673423 is an equidigital number, since it uses as much as digits as its factorization.

309673423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 37.

The square root of 309673423 is about 17597.5402542514. The cubic root of 309673423 is about 676.5522014583.

The spelling of 309673423 in words is "three hundred nine million, six hundred seventy-three thousand, four hundred twenty-three".