9867901321 has 4 divisors (see below), whose sum is σ = 9943228944. Its totient is φ = 9792573700.

The previous prime is 9867901319. The next prime is 9867901327. The reversal of 9867901321 is 1231097689.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1231097689 = 733 ⋅1679533.

It is a cyclic number.

It is not a de Polignac number, because 9867901321 - 2¹ = 9867901319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9867901327) 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, 37663615 + ... + 37663876.

It is an arithmetic number, because the mean of its divisors is an integer number (2485807236).

Almost surely, 2^9867901321 is an apocalyptic number.

It is an amenable number.

9867901321 is a deficient number, since it is larger than the sum of its proper divisors (75327623).

9867901321 is a wasteful number, since it uses less digits than its factorization.

9867901321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75327622.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 9867901321 is about 99337.3108202552. The cubic root of 9867901321 is about 2144.9060092880.

The spelling of 9867901321 in words is "nine billion, eight hundred sixty-seven million, nine hundred one thousand, three hundred twenty-one".