9651687049 has 9 divisors (see below), whose sum is σ = 10254604647. Its totient is φ = 9082368864.

The previous prime is 9651687047. The next prime is 9651687053. The reversal of 9651687049 is 9407861569.

The square root of 9651687049 is 98243.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 7514289225 + 2137397824 = 86685^2 + 46232^2 .

It is not a de Polignac number, because 9651687049 - 2¹ = 9651687047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9651687047) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1667242 + ... + 1673020.

Almost surely, 2^9651687049 is an apocalyptic number.

9651687049 is the 98243-rd square number.

9651687049 is the 49122-nd centered octagonal number.

It is an amenable number.

9651687049 is a deficient number, since it is larger than the sum of its proper divisors (602917598).

9651687049 is an frugal number, since it uses more digits than its factorization.

9651687049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11592 (or 5796 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 55.

The cubic root of 9651687049 is about 2129.1245970317.

The spelling of 9651687049 in words is "nine billion, six hundred fifty-one million, six hundred eighty-seven thousand, forty-nine".