306520423 has 8 divisors (see below), whose sum is σ = 336235536. Its totient is φ = 277113600.

The previous prime is 306520397. The next prime is 306520427. The reversal of 306520423 is 324025603.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 306520423 - 2²¹ = 304423271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306520427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74986 + ... + 78967.

It is an arithmetic number, because the mean of its divisors is an integer number (42029442).

Almost surely, 2^306520423 is an apocalyptic number.

306520423 is a deficient number, since it is larger than the sum of its proper divisors (29715113).

306520423 is a wasteful number, since it uses less digits than its factorization.

306520423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154145.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 306520423 is about 17507.7246665579. The cubic root of 306520423 is about 674.2482150410.

The spelling of 306520423 in words is "three hundred six million, five hundred twenty thousand, four hundred twenty-three".