306692421 has 16 divisors (see below), whose sum is σ = 476880000. Its totient is φ = 175252224.

The previous prime is 306692417. The next prime is 306692431. The reversal of 306692421 is 124296603.

It is not a de Polignac number, because 306692421 - 2² = 306692417 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306692411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147996 + ... + 150053.

It is an arithmetic number, because the mean of its divisors is an integer number (29805000).

Almost surely, 2^306692421 is an apocalyptic number.

It is an amenable number.

306692421 is a deficient number, since it is larger than the sum of its proper divisors (170187579).

306692421 is an equidigital number, since it uses as much as digits as its factorization.

306692421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298073 (or 298059 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 306692421 is about 17512.6360380155. The cubic root of 306692421 is about 674.3743052362.

The spelling of 306692421 in words is "three hundred six million, six hundred ninety-two thousand, four hundred twenty-one".