9772091986 has 8 divisors (see below), whose sum is σ = 14803268364. Its totient is φ = 4837669200.

The previous prime is 9772091983. The next prime is 9772092019. The reversal of 9772091986 is 6891902779.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8202743761 + 1569348225 = 90569^2 + 39615^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 9772091986.

It is not an unprimeable number, because it can be changed into a prime (9772091983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24188145 + ... + 24188548.

Almost surely, 2^9772091986 is an apocalyptic number.

9772091986 is a deficient number, since it is larger than the sum of its proper divisors (5031176378).

9772091986 is a wasteful number, since it uses less digits than its factorization.

9772091986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48376796.

The product of its (nonzero) digits is 3429216, while the sum is 58.

The square root of 9772091986 is about 98853.8921135632. The cubic root of 9772091986 is about 2137.9416538953.

The spelling of 9772091986 in words is "nine billion, seven hundred seventy-two million, ninety-one thousand, nine hundred eighty-six".