9158967921 has 4 divisors (see below), whose sum is σ = 12211957232. Its totient is φ = 6105978612.

The previous prime is 9158967859. The next prime is 9158967971. The reversal of 9158967921 is 1297698519.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 9158967921 - 2¹⁴ = 9158951537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9158967971) 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, 1526494651 + ... + 1526494656.

It is an arithmetic number, because the mean of its divisors is an integer number (3052989308).

Almost surely, 2^9158967921 is an apocalyptic number.

It is an amenable number.

9158967921 is a deficient number, since it is larger than the sum of its proper divisors (3052989311).

9158967921 is a wasteful number, since it uses less digits than its factorization.

9158967921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3052989310.

The product of its digits is 2449440, while the sum is 57.

The square root of 9158967921 is about 95702.4969423473. The cubic root of 9158967921 is about 2092.2593273868.

The spelling of 9158967921 in words is "nine billion, one hundred fifty-eight million, nine hundred sixty-seven thousand, nine hundred twenty-one".