309453423 has 4 divisors (see below), whose sum is σ = 412604568. Its totient is φ = 206302280.

The previous prime is 309453421. The next prime is 309453433. The reversal of 309453423 is 324354903.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 309453423 - 2¹ = 309453421 is a prime.

It is a super-2 number, since 2×309453423² = 191522842012833858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309453421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51575568 + ... + 51575573.

It is an arithmetic number, because the mean of its divisors is an integer number (103151142).

Almost surely, 2^309453423 is an apocalyptic number.

309453423 is a deficient number, since it is larger than the sum of its proper divisors (103151145).

309453423 is a wasteful number, since it uses less digits than its factorization.

309453423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103151144.

The product of its (nonzero) digits is 38880, while the sum is 33.

The square root of 309453423 is about 17591.2882700500. The cubic root of 309453423 is about 676.3919501159.

The spelling of 309453423 in words is "three hundred nine million, four hundred fifty-three thousand, four hundred twenty-three".