861077029 has 2 divisors, whose sum is σ = 861077030. Its totient is φ = 861077028.

The previous prime is 861077023. The next prime is 861077089. The reversal of 861077029 is 920770168.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 772284100 + 88792929 = 27790^2 + 9423^2 .

It is a cyclic number.

It is not a de Polignac number, because 861077029 - 2⁷ = 861076901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 861076982 and 861077000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861077023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430538514 + 430538515.

It is an arithmetic number, because the mean of its divisors is an integer number (430538515).

Almost surely, 2^861077029 is an apocalyptic number.

It is an amenable number.

861077029 is a deficient number, since it is larger than the sum of its proper divisors (1).

861077029 is an equidigital number, since it uses as much as digits as its factorization.

861077029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 861077029 is about 29344.1140435352. The cubic root of 861077029 is about 951.3653604648.

The spelling of 861077029 in words is "eight hundred sixty-one million, seventy-seven thousand, twenty-nine".