8505972739 has 16 divisors (see below), whose sum is σ = 9537016320. Its totient is φ = 7520816160.

The previous prime is 8505972719. The next prime is 8505972749. The reversal of 8505972739 is 9372795058.

It is not a de Polignac number, because 8505972739 - 2⁵ = 8505972707 is a prime.

It is a super-2 number, since 2×8505972739² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8505972739.

It is not an unprimeable number, because it can be changed into a prime (8505972719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14824 + ... + 131269.

It is an arithmetic number, because the mean of its divisors is an integer number (596063520).

Almost surely, 2^8505972739 is an apocalyptic number.

8505972739 is a deficient number, since it is larger than the sum of its proper divisors (1031043581).

8505972739 is a wasteful number, since it uses less digits than its factorization.

8505972739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146250.

The product of its (nonzero) digits is 4762800, while the sum is 55.

The square root of 8505972739 is about 92227.8306098544. The cubic root of 8505972739 is about 2041.3054519929.

The spelling of 8505972739 in words is "eight billion, five hundred five million, nine hundred seventy-two thousand, seven hundred thirty-nine".