306699121 has 4 divisors (see below), whose sum is σ = 322841200. Its totient is φ = 290557044.

The previous prime is 306699119. The next prime is 306699163. The reversal of 306699121 is 121996603.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121996603 = 1013 ⋅120431.

It is not a de Polignac number, because 306699121 - 2¹ = 306699119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (306699221) 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, 8071011 + ... + 8071048.

It is an arithmetic number, because the mean of its divisors is an integer number (80710300).

Almost surely, 2^306699121 is an apocalyptic number.

It is an amenable number.

306699121 is a deficient number, since it is larger than the sum of its proper divisors (16142079).

306699121 is a wasteful number, since it uses less digits than its factorization.

306699121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16142078.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 306699121 is about 17512.8273274192. The cubic root of 306699121 is about 674.3792159922.

The spelling of 306699121 in words is "three hundred six million, six hundred ninety-nine thousand, one hundred twenty-one".