9368379821 has 4 divisors (see below), whose sum is σ = 9370818912. Its totient is φ = 9365940732.

The previous prime is 9368379793. The next prime is 9368379827. The reversal of 9368379821 is 1289738639.

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 a cyclic number.

It is not a de Polignac number, because 9368379821 - 2¹⁰ = 9368378797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9368379827) 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, 1213775 + ... + 1221468.

It is an arithmetic number, because the mean of its divisors is an integer number (2342704728).

Almost surely, 2^9368379821 is an apocalyptic number.

It is an amenable number.

9368379821 is a deficient number, since it is larger than the sum of its proper divisors (2439091).

9368379821 is a wasteful number, since it uses less digits than its factorization.

9368379821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2439090.

The product of its digits is 3919104, while the sum is 56.

The square root of 9368379821 is about 96790.3911604866. The cubic root of 9368379821 is about 2108.0852196950.

The spelling of 9368379821 in words is "nine billion, three hundred sixty-eight million, three hundred seventy-nine thousand, eight hundred twenty-one".