861017371 has 2 divisors, whose sum is σ = 861017372. Its totient is φ = 861017370.

The previous prime is 861017363. The next prime is 861017413. The reversal of 861017371 is 173710168.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 861017371 - 2³ = 861017363 is a prime.

It is not a weakly prime, because it can be changed into another prime (861018371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430508685 + 430508686.

It is an arithmetic number, because the mean of its divisors is an integer number (430508686).

Almost surely, 2^861017371 is an apocalyptic number.

861017371 is a deficient number, since it is larger than the sum of its proper divisors (1).

861017371 is an equidigital number, since it uses as much as digits as its factorization.

861017371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 861017371 is about 29343.0975017976. The cubic root of 861017371 is about 951.3433888085.

The spelling of 861017371 in words is "eight hundred sixty-one million, seventeen thousand, three hundred seventy-one".