306495397 has 8 divisors (see below), whose sum is σ = 349488216. Its totient is φ = 266276352.

The previous prime is 306495379. The next prime is 306495407. The reversal of 306495397 is 793594603.

It can be written as a sum of positive squares in 4 ways, for example, as 6305121 + 300190276 = 2511^2 + 17326^2 .

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 306495397 - 2⁷ = 306495269 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 (306495317) 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, 693208 + ... + 693649.

It is an arithmetic number, because the mean of its divisors is an integer number (43686027).

Almost surely, 2^306495397 is an apocalyptic number.

It is an amenable number.

306495397 is a deficient number, since it is larger than the sum of its proper divisors (42992819).

306495397 is a wasteful number, since it uses less digits than its factorization.

306495397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386887.

The product of its (nonzero) digits is 612360, while the sum is 46.

The square root of 306495397 is about 17507.0099388788. The cubic root of 306495397 is about 674.2298647737.

It can be divided in two parts, 30649 and 5397, that added together give a triangular number (36046 = T₂₆₈).

The spelling of 306495397 in words is "three hundred six million, four hundred ninety-five thousand, three hundred ninety-seven".