15983947 has 6 divisors (see below), whose sum is σ = 18593628. Its totient is φ = 13700484.

The previous prime is 15983939. The next prime is 15983969. The reversal of 15983947 is 74938951.

It is a happy number.

It is not a de Polignac number, because 15983947 - 2³ = 15983939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15983897 and 15983906.

It is not an unprimeable number, because it can be changed into a prime (15983987) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 163053 + ... + 163150.

It is an arithmetic number, because the mean of its divisors is an integer number (3098938).

Almost surely, 2^15983947 is an apocalyptic number.

15983947 is a deficient number, since it is larger than the sum of its proper divisors (2609681).

15983947 is an equidigital number, since it uses as much as digits as its factorization.

15983947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326217 (or 326210 counting only the distinct ones).

The product of its digits is 272160, while the sum is 46.

The square root of 15983947 is about 3997.9928714294. The cubic root of 15983947 is about 251.8999088100.

The spelling of 15983947 in words is "fifteen million, nine hundred eighty-three thousand, nine hundred forty-seven".