306797381 has 4 divisors (see below), whose sum is σ = 334688064. Its totient is φ = 278906700.

The previous prime is 306797371. The next prime is 306797401. The reversal of 306797381 is 183797603.

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: 183797603 = 11 ⋅16708873.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-306797381 is a prime.

It is a super-2 number, since 2×306797381² = 188249265976918322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306797321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13945325 + ... + 13945346.

It is an arithmetic number, because the mean of its divisors is an integer number (83672016).

Almost surely, 2^306797381 is an apocalyptic number.

It is an amenable number.

306797381 is a deficient number, since it is larger than the sum of its proper divisors (27890683).

306797381 is a wasteful number, since it uses less digits than its factorization.

306797381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27890682.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 306797381 is about 17515.6324750207. The cubic root of 306797381 is about 674.4512273131.

The spelling of 306797381 in words is "three hundred six million, seven hundred ninety-seven thousand, three hundred eighty-one".