309394279394 has 4 divisors (see below), whose sum is σ = 464091419094. Its totient is φ = 154697139696.

The previous prime is 309394279361. The next prime is 309394279409. The reversal of 309394279394 is 493972493903.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 161111523769 + 148282755625 = 401387^2 + 385075^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77348569847 + ... + 77348569850.

Almost surely, 2^309394279394 is an apocalyptic number.

309394279394 is a deficient number, since it is larger than the sum of its proper divisors (154697139700).

309394279394 is a wasteful number, since it uses less digits than its factorization.

309394279394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154697139699.

The product of its (nonzero) digits is 39680928, while the sum is 62.

The spelling of 309394279394 in words is "three hundred nine billion, three hundred ninety-four million, two hundred seventy-nine thousand, three hundred ninety-four".