861913733 has 2 divisors, whose sum is σ = 861913734. Its totient is φ = 861913732.

The previous prime is 861913697. The next prime is 861913747. The reversal of 861913733 is 337319168.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 797384644 + 64529089 = 28238^2 + 8033^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-861913733 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861913763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430956866 + 430956867.

It is an arithmetic number, because the mean of its divisors is an integer number (430956867).

Almost surely, 2^861913733 is an apocalyptic number.

It is an amenable number.

861913733 is a deficient number, since it is larger than the sum of its proper divisors (1).

861913733 is an equidigital number, since it uses as much as digits as its factorization.

861913733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 41.

The square root of 861913733 is about 29358.3673422076. The cubic root of 861913733 is about 951.6734062757.

The spelling of 861913733 in words is "eight hundred sixty-one million, nine hundred thirteen thousand, seven hundred thirty-three".