309421396 has 6 divisors (see below), whose sum is σ = 541487450. Its totient is φ = 154710696.

The previous prime is 309421393. The next prime is 309421451. The reversal of 309421396 is 693124903.

It can be written as a sum of positive squares in only one way, i.e., 259210000 + 50211396 = 16100^2 + 7086^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309421391) 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 as a sum of consecutive naturals, namely, 38677671 + ... + 38677678.

Almost surely, 2^309421396 is an apocalyptic number.

It is an amenable number.

309421396 is a deficient number, since it is larger than the sum of its proper divisors (232066054).

309421396 is a wasteful number, since it uses less digits than its factorization.

309421396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77355353 (or 77355351 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 309421396 is about 17590.3779379523. The cubic root of 309421396 is about 676.3686148299.

The spelling of 309421396 in words is "three hundred nine million, four hundred twenty-one thousand, three hundred ninety-six".