9672249861 has 6 divisors (see below), whose sum is σ = 13971027590. Its totient is φ = 6448166568.

The previous prime is 9672249781. The next prime is 9672249863. The reversal of 9672249861 is 1689422769.

9672249861 is a `hidden beast` number, since 96 + 7 + 2 + 2 + 498 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9274845636 + 397404225 = 96306^2 + 19935^2 .

It is not a de Polignac number, because 9672249861 - 2¹⁹ = 9671725573 is a prime.

It is a super-2 number, since 2×9672249861² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9672249798 and 9672249807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9672249863) 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, 537347206 + ... + 537347223.

Almost surely, 2^9672249861 is an apocalyptic number.

It is an amenable number.

9672249861 is a deficient number, since it is larger than the sum of its proper divisors (4298777729).

9672249861 is a wasteful number, since it uses less digits than its factorization.

9672249861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074694435 (or 1074694432 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 9672249861 is about 98347.5971287555. The cubic root of 9672249861 is about 2130.6355499475.

The spelling of 9672249861 in words is "nine billion, six hundred seventy-two million, two hundred forty-nine thousand, eight hundred sixty-one".