861419231 has 2 divisors, whose sum is σ = 861419232. Its totient is φ = 861419230.

The previous prime is 861419183. The next prime is 861419249. The reversal of 861419231 is 132914168.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 861419231 - 2²⁶ = 794310367 is a prime.

It is a super-2 number, since 2×861419231² = 1484086183073262722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 861419191 and 861419200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861415231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430709615 + 430709616.

It is an arithmetic number, because the mean of its divisors is an integer number (430709616).

Almost surely, 2^861419231 is an apocalyptic number.

861419231 is a deficient number, since it is larger than the sum of its proper divisors (1).

861419231 is an equidigital number, since it uses as much as digits as its factorization.

861419231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 35.

The square root of 861419231 is about 29349.9443099983. The cubic root of 861419231 is about 951.4913716503.

The spelling of 861419231 in words is "eight hundred sixty-one million, four hundred nineteen thousand, two hundred thirty-one".