861325679 has 2 divisors, whose sum is σ = 861325680. Its totient is φ = 861325678.

The previous prime is 861325649. The next prime is 861325693. The reversal of 861325679 is 976523168.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 861325679 - 2¹² = 861321583 is a prime.

It is a super-2 number, since 2×861325679² = 1483763850609622082, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861325649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430662839 + 430662840.

It is an arithmetic number, because the mean of its divisors is an integer number (430662840).

Almost surely, 2^861325679 is an apocalyptic number.

861325679 is a deficient number, since it is larger than the sum of its proper divisors (1).

861325679 is an equidigital number, since it uses as much as digits as its factorization.

861325679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 47.

The square root of 861325679 is about 29348.3505328664. The cubic root of 861325679 is about 951.4569257266.

The spelling of 861325679 in words is "eight hundred sixty-one million, three hundred twenty-five thousand, six hundred seventy-nine".