1329723 has 16 divisors (see below), whose sum is σ = 2086560. Its totient is φ = 834048.

The previous prime is 1329721. The next prime is 1329733. The reversal of 1329723 is 3279231.

It is not a de Polignac number, because 1329723 - 2¹ = 1329721 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1329721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 990 + ... + 1907.

It is an arithmetic number, because the mean of its divisors is an integer number (130410).

2^1329723 is an apocalyptic number.

1329723 is a deficient number, since it is larger than the sum of its proper divisors (756837).

1329723 is a wasteful number, since it uses less digits than its factorization.

1329723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2923 (or 2917 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 1329723 is about 1153.1361584826. The cubic root of 1329723 is about 109.9648096800.

The spelling of 1329723 in words is "one million, three hundred twenty-nine thousand, seven hundred twenty-three".