1009723 has 16 divisors (see below), whose sum is σ = 1241856. Its totient is φ = 807840.

The previous prime is 1009669. The next prime is 1009727. The reversal of 1009723 is 3279001.

It is not a de Polignac number, because 1009723 - 2¹³ = 1001531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1009694 and 1009703.

It is not an unprimeable number, because it can be changed into a prime (1009727) 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, 3136 + ... + 3442.

It is an arithmetic number, because the mean of its divisors is an integer number (77616).

2^1009723 is an apocalyptic number.

1009723 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1009723 is a deficient number, since it is larger than the sum of its proper divisors (232133).

1009723 is a wasteful number, since it uses less digits than its factorization.

1009723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 1009723 is about 1004.8497400109. The cubic root of 1009723 is about 100.3230552293.

Adding to 1009723 its product of nonzero digits (378), we get a palindrome (1010101).

The spelling of 1009723 in words is "one million, nine thousand, seven hundred twenty-three".