1509983 has 4 divisors (see below), whose sum is σ = 1513008. Its totient is φ = 1506960.

The previous prime is 1509971. The next prime is 1509997. The reversal of 1509983 is 3899051.

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 1509983 - 2⁴ = 1509967 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 (1509913) 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, 566 + ... + 1827.

It is an arithmetic number, because the mean of its divisors is an integer number (378252).

2^1509983 is an apocalyptic number.

1509983 is a deficient number, since it is larger than the sum of its proper divisors (3025).

1509983 is an equidigital number, since it uses as much as digits as its factorization.

1509983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3024.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 1509983 is about 1228.8136555231. The cubic root of 1509983 is about 114.7248114537.

The spelling of 1509983 in words is "one million, five hundred nine thousand, nine hundred eighty-three".