1223809494 has 48 divisors (see below), whose sum is σ = 2591501040. Its totient is φ = 385228800.

The previous prime is 1223809487. The next prime is 1223809501. The reversal of 1223809494 is 4949083221.

It is an interprime number because it is at equal distance from previous prime (1223809487) and next prime (1223809501).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 867862 + ... + 869270.

It is an arithmetic number, because the mean of its divisors is an integer number (53989605).

Almost surely, 2^1223809494 is an apocalyptic number.

1223809494 is an abundant number, since it is smaller than the sum of its proper divisors (1367691546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1223809494 is a wasteful number, since it uses less digits than its factorization.

1223809494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853 (or 1834 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 1223809494 is about 34982.9886373363. The cubic root of 1223809494 is about 1069.6407487580.

The spelling of 1223809494 in words is "one billion, two hundred twenty-three million, eight hundred nine thousand, four hundred ninety-four".