15243983 has 4 divisors (see below), whose sum is σ = 15304968. Its totient is φ = 15183000.

The previous prime is 15243979. The next prime is 15244003. The reversal of 15243983 is 38934251.

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

It is a cyclic number.

It is not a de Polignac number, because 15243983 - 2² = 15243979 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15243083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30116 + ... + 30617.

It is an arithmetic number, because the mean of its divisors is an integer number (3826242).

Almost surely, 2^15243983 is an apocalyptic number.

15243983 is a deficient number, since it is larger than the sum of its proper divisors (60985).

15243983 is an equidigital number, since it uses as much as digits as its factorization.

15243983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60984.

The product of its digits is 25920, while the sum is 35.

The square root of 15243983 is about 3904.3543640402. The cubic root of 15243983 is about 247.9511642914.

The spelling of 15243983 in words is "fifteen million, two hundred forty-three thousand, nine hundred eighty-three".