1223948949 has 16 divisors (see below), whose sum is σ = 1764695808. Its totient is φ = 751626752.

The previous prime is 1223948941. The next prime is 1223948951. The reversal of 1223948949 is 9498493221.

It is a cyclic number.

It is not a de Polignac number, because 1223948949 - 2³ = 1223948941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223948941) 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, 252912 + ... + 257705.

It is an arithmetic number, because the mean of its divisors is an integer number (110293488).

Almost surely, 2^1223948949 is an apocalyptic number.

It is an amenable number.

1223948949 is a deficient number, since it is larger than the sum of its proper divisors (540746859).

1223948949 is a wasteful number, since it uses less digits than its factorization.

1223948949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510684.

The product of its digits is 1119744, while the sum is 51.

The square root of 1223948949 is about 34984.9817636082. The cubic root of 1223948949 is about 1069.6813762919.

The spelling of 1223948949 in words is "one billion, two hundred twenty-three million, nine hundred forty-eight thousand, nine hundred forty-nine".