1209923 has 8 divisors (see below), whose sum is σ = 1421616. Its totient is φ = 1015200.

The previous prime is 1209889. The next prime is 1209931. The reversal of 1209923 is 3299021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1209923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1209892 and 1209901.

It is not an unprimeable number, because it can be changed into a prime (1209973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4088 + ... + 4373.

It is an arithmetic number, because the mean of its divisors is an integer number (177702).

2^1209923 is an apocalyptic number.

1209923 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1209923 is a deficient number, since it is larger than the sum of its proper divisors (211693).

1209923 is a wasteful number, since it uses less digits than its factorization.

1209923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8485.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 1209923 is about 1099.9649994432. The cubic root of 1209923 is about 106.5579632603.

The spelling of 1209923 in words is "one million, two hundred nine thousand, nine hundred twenty-three".