309698445 has 16 divisors (see below), whose sum is σ = 566305920. Its totient is φ = 141576384.

The previous prime is 309698413. The next prime is 309698447. The reversal of 309698445 is 544896903.

It is not a de Polignac number, because 309698445 - 2⁵ = 309698413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 309698394 and 309698403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309698447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1474650 + ... + 1474859.

It is an arithmetic number, because the mean of its divisors is an integer number (35394120).

Almost surely, 2^309698445 is an apocalyptic number.

309698445 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

309698445 is a deficient number, since it is larger than the sum of its proper divisors (256607475).

309698445 is a wasteful number, since it uses less digits than its factorization.

309698445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2949524.

The product of its (nonzero) digits is 933120, while the sum is 48.

The square root of 309698445 is about 17598.2511915247. The cubic root of 309698445 is about 676.5704230556.

The spelling of 309698445 in words is "three hundred nine million, six hundred ninety-eight thousand, four hundred forty-five".