39429280861 has 2 divisors, whose sum is σ = 39429280862. Its totient is φ = 39429280860.

The previous prime is 39429280763. The next prime is 39429280867. The reversal of 39429280861 is 16808292493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30199835961 + 9229444900 = 173781^2 + 96070^2 .

It is a cyclic number.

It is not a de Polignac number, because 39429280861 - 2⁷ = 39429280733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39429280799 and 39429280808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39429280867) 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, 19714640430 + 19714640431.

It is an arithmetic number, because the mean of its divisors is an integer number (19714640431).

Almost surely, 2^39429280861 is an apocalyptic number.

It is an amenable number.

39429280861 is a deficient number, since it is larger than the sum of its proper divisors (1).

39429280861 is an equidigital number, since it uses as much as digits as its factorization.

39429280861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1492992, while the sum is 52.

The spelling of 39429280861 in words is "thirty-nine billion, four hundred twenty-nine million, two hundred eighty thousand, eight hundred sixty-one".