861233959 has 2 divisors, whose sum is σ = 861233960. Its totient is φ = 861233958.

The previous prime is 861233927. The next prime is 861233981. The reversal of 861233959 is 959332168.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 861233959 - 2⁵ = 861233927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861233999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430616979 + 430616980.

It is an arithmetic number, because the mean of its divisors is an integer number (430616980).

Almost surely, 2^861233959 is an apocalyptic number.

861233959 is a deficient number, since it is larger than the sum of its proper divisors (1).

861233959 is an equidigital number, since it uses as much as digits as its factorization.

861233959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 46.

The square root of 861233959 is about 29346.7878821516. The cubic root of 861233959 is about 951.4231519252.

The spelling of 861233959 in words is "eight hundred sixty-one million, two hundred thirty-three thousand, nine hundred fifty-nine".