15983949 has 8 divisors (see below), whose sum is σ = 21340960. Its totient is φ = 10641456.

The previous prime is 15983939. The next prime is 15983969. The reversal of 15983949 is 94938951.

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

It is not a de Polignac number, because 15983949 - 2²⁰ = 14935373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15983898 and 15983907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15983909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 727 + ... + 5700.

It is an arithmetic number, because the mean of its divisors is an integer number (2667620).

Almost surely, 2^15983949 is an apocalyptic number.

It is an amenable number.

15983949 is a deficient number, since it is larger than the sum of its proper divisors (5357011).

15983949 is an equidigital number, since it uses as much as digits as its factorization.

15983949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7259.

The product of its digits is 349920, while the sum is 48.

The square root of 15983949 is about 3997.9931215549. The cubic root of 15983949 is about 251.8999193164.

The spelling of 15983949 in words is "fifteen million, nine hundred eighty-three thousand, nine hundred forty-nine".