861930380527 has 2 divisors, whose sum is σ = 861930380528. Its totient is φ = 861930380526.

The previous prime is 861930380497. The next prime is 861930380539. The reversal of 861930380527 is 725083039168.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-861930380527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861930381527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430965190263 + 430965190264.

It is an arithmetic number, because the mean of its divisors is an integer number (430965190264).

Almost surely, 2^861930380527 is an apocalyptic number.

861930380527 is a deficient number, since it is larger than the sum of its proper divisors (1).

861930380527 is an equidigital number, since it uses as much as digits as its factorization.

861930380527 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 861930380527 in words is "eight hundred sixty-one billion, nine hundred thirty million, three hundred eighty thousand, five hundred twenty-seven".