1989315 has 12 divisors (see below), whose sum is σ = 3448224. Its totient is φ = 1060944.

The previous prime is 1989307. The next prime is 1989329. The reversal of 1989315 is 5139891.

It is a happy number.

It is not a de Polignac number, because 1989315 - 2³ = 1989307 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1989315.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22059 + ... + 22148.

It is an arithmetic number, because the mean of its divisors is an integer number (287352).

2^1989315 is an apocalyptic number.

1989315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1989315 is a deficient number, since it is larger than the sum of its proper divisors (1458909).

1989315 is a wasteful number, since it uses less digits than its factorization.

1989315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44218 (or 44215 counting only the distinct ones).

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

The square root of 1989315 is about 1410.4307852568. The cubic root of 1989315 is about 125.7673332918.

It can be divided in two parts, 1989 and 315, that added together give a square (2304 = 48²).

The spelling of 1989315 in words is "one million, nine hundred eighty-nine thousand, three hundred fifteen".