1223699 has 4 divisors (see below), whose sum is σ = 1240536. Its totient is φ = 1206864.

The previous prime is 1223693. The next prime is 1223723. The reversal of 1223699 is 9963221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9963221 = 1453 ⋅6857.

It is a cyclic number.

It is not a de Polignac number, because 1223699 - 2⁴ = 1223683 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1223693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8309 + ... + 8454.

It is an arithmetic number, because the mean of its divisors is an integer number (310134).

2^1223699 is an apocalyptic number.

1223699 is a deficient number, since it is larger than the sum of its proper divisors (16837).

1223699 is an equidigital number, since it uses as much as digits as its factorization.

1223699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16836.

The product of its digits is 5832, while the sum is 32.

The square root of 1223699 is about 1106.2092930364. The cubic root of 1223699 is about 106.9608556263.

The spelling of 1223699 in words is "one million, two hundred twenty-three thousand, six hundred ninety-nine".