861101029 has 2 divisors, whose sum is σ = 861101030. Its totient is φ = 861101028.

The previous prime is 861101023. The next prime is 861101039. The reversal of 861101029 is 920101168.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 859076100 + 2024929 = 29310^2 + 1423^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-861101029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 861100988 and 861101006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861101023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430550514 + 430550515.

It is an arithmetic number, because the mean of its divisors is an integer number (430550515).

Almost surely, 2^861101029 is an apocalyptic number.

It is an amenable number.

861101029 is a deficient number, since it is larger than the sum of its proper divisors (1).

861101029 is an equidigital number, since it uses as much as digits as its factorization.

861101029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 861101029 is about 29344.5229812993. The cubic root of 861101029 is about 951.3741992236.

The spelling of 861101029 in words is "eight hundred sixty-one million, one hundred one thousand, twenty-nine".