861233949 has 12 divisors (see below), whose sum is σ = 1244568156. Its totient is φ = 573895872.

The previous prime is 861233927. The next prime is 861233959. The reversal of 861233949 is 949332168.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 480398724 + 380835225 = 21918^2 + 19515^2 .

It is not a de Polignac number, because 861233949 - 2⁵ = 861233917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861233959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 489 + ... + 41505.

It is an arithmetic number, because the mean of its divisors is an integer number (103714013).

Almost surely, 2^861233949 is an apocalyptic number.

It is an amenable number.

861233949 is a deficient number, since it is larger than the sum of its proper divisors (383334207).

861233949 is a wasteful number, since it uses less digits than its factorization.

861233949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43356 (or 43353 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 861233949 is about 29346.7877117752. The cubic root of 861233949 is about 951.4231482428.

The spelling of 861233949 in words is "eight hundred sixty-one million, two hundred thirty-three thousand, nine hundred forty-nine".