8390070729 has 6 divisors (see below), whose sum is σ = 12118991066. Its totient is φ = 5593380480.

The previous prime is 8390070727. The next prime is 8390070763. The reversal of 8390070729 is 9270700938.

It can be written as a sum of positive squares in only one way, i.e., 7527297600 + 862773129 = 86760^2 + 29373^2 .

It is not a de Polignac number, because 8390070729 - 2¹ = 8390070727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8390070727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 466115032 + ... + 466115049.

Almost surely, 2^8390070729 is an apocalyptic number.

It is an amenable number.

8390070729 is a deficient number, since it is larger than the sum of its proper divisors (3728920337).

8390070729 is a wasteful number, since it uses less digits than its factorization.

8390070729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932230087 (or 932230084 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 8390070729 is about 91597.3292678340. The cubic root of 8390070729 is about 2031.9914395067.

The spelling of 8390070729 in words is "eight billion, three hundred ninety million, seventy thousand, seven hundred twenty-nine".