1983915 has 12 divisors (see below), whose sum is σ = 3438864. Its totient is φ = 1058064.

The previous prime is 1983913. The next prime is 1983929. The reversal of 1983915 is 5193891.

It is a happy number.

It is not a de Polignac number, because 1983915 - 2¹ = 1983913 is a prime.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 1983915.

It is not an unprimeable number, because it can be changed into a prime (1983913) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21999 + ... + 22088.

It is an arithmetic number, because the mean of its divisors is an integer number (286572).

2^1983915 is an apocalyptic number.

1983915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1983915 is a deficient number, since it is larger than the sum of its proper divisors (1454949).

1983915 is a wasteful number, since it uses less digits than its factorization.

1983915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44098 (or 44095 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 1983915 is about 1408.5151756371. The cubic root of 1983915 is about 125.6534315986.

The spelling of 1983915 in words is "one million, nine hundred eighty-three thousand, nine hundred fifteen".