1223375749 has 4 divisors (see below), whose sum is σ = 1223565280. Its totient is φ = 1223186220.

The previous prime is 1223375729. The next prime is 1223375771. The reversal of 1223375749 is 9475733221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1223375749 - 2⁵ = 1223375717 is a prime.

It is a super-2 number, since 2×1223375749² = 2993296446482622002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223375729) 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, 84729 + ... + 98110.

It is an arithmetic number, because the mean of its divisors is an integer number (305891320).

Almost surely, 2^1223375749 is an apocalyptic number.

It is an amenable number.

1223375749 is a deficient number, since it is larger than the sum of its proper divisors (189531).

1223375749 is an equidigital number, since it uses as much as digits as its factorization.

1223375749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189530.

The product of its digits is 317520, while the sum is 43.

The square root of 1223375749 is about 34976.7887176625. The cubic root of 1223375749 is about 1069.5143657572.

The spelling of 1223375749 in words is "one billion, two hundred twenty-three million, three hundred seventy-five thousand, seven hundred forty-nine".