309470081 has 8 divisors (see below), whose sum is σ = 326022720. Its totient is φ = 292943952.

The previous prime is 309470071. The next prime is 309470089. The reversal of 309470081 is 180074903.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-309470081 is a prime.

It is a super-2 number, since 2×309470081² = 191543462068293122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (309470089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20156 + ... + 32018.

It is an arithmetic number, because the mean of its divisors is an integer number (40752840).

Almost surely, 2^309470081 is an apocalyptic number.

It is an amenable number.

309470081 is a deficient number, since it is larger than the sum of its proper divisors (16552639).

309470081 is a wasteful number, since it uses less digits than its factorization.

309470081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13255.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 309470081 is about 17591.7617366766. The cubic root of 309470081 is about 676.4040867134.

The spelling of 309470081 in words is "three hundred nine million, four hundred seventy thousand, eighty-one".