304411993 has 2 divisors, whose sum is σ = 304411994. Its totient is φ = 304411992.

The previous prime is 304411973. The next prime is 304412041. The reversal of 304411993 is 399114403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 244859904 + 59552089 = 15648^2 + 7717^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-304411993 is a prime.

It is a super-2 number, since 2×304411993² = 185333322964464098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (304411973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152205996 + 152205997.

It is an arithmetic number, because the mean of its divisors is an integer number (152205997).

Almost surely, 2^304411993 is an apocalyptic number.

It is an amenable number.

304411993 is a deficient number, since it is larger than the sum of its proper divisors (1).

304411993 is an equidigital number, since it uses as much as digits as its factorization.

304411993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 304411993 is about 17447.4064834863. The cubic root of 304411993 is about 672.6986965101.

The spelling of 304411993 in words is "three hundred four million, four hundred eleven thousand, nine hundred ninety-three".