9967951389 has 32 divisors (see below), whose sum is σ = 15314669568. Its totient is φ = 5710320000.

The previous prime is 9967951387. The next prime is 9967951421. The reversal of 9967951389 is 9831597699.

It is not a de Polignac number, because 9967951389 - 2¹ = 9967951387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9967951387) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69312 + ... + 157289.

It is an arithmetic number, because the mean of its divisors is an integer number (478583424).

Almost surely, 2^9967951389 is an apocalyptic number.

It is an amenable number.

9967951389 is a deficient number, since it is larger than the sum of its proper divisors (5346718179).

9967951389 is a wasteful number, since it uses less digits than its factorization.

9967951389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226689.

The product of its digits is 33067440, while the sum is 66.

The square root of 9967951389 is about 99839.6283496689. The cubic root of 9967951389 is about 2152.1306722803.

The spelling of 9967951389 in words is "nine billion, nine hundred sixty-seven million, nine hundred fifty-one thousand, three hundred eighty-nine".