321968741 has 4 divisors (see below), whose sum is σ = 326503584. Its totient is φ = 317433900.

The previous prime is 321968719. The next prime is 321968761. The reversal of 321968741 is 147869123.

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: 147869123 = 4493 ⋅32911.

It is not a de Polignac number, because 321968741 - 2⁶ = 321968677 is a prime.

It is a super-2 number, since 2×321968741² = 207327740362250162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321968761) 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, 2267315 + ... + 2267456.

It is an arithmetic number, because the mean of its divisors is an integer number (81625896).

Almost surely, 2^321968741 is an apocalyptic number.

It is an amenable number.

321968741 is a deficient number, since it is larger than the sum of its proper divisors (4534843).

321968741 is an equidigital number, since it uses as much as digits as its factorization.

321968741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4534842.

The product of its digits is 72576, while the sum is 41.

The square root of 321968741 is about 17943.4874258044. The cubic root of 321968741 is about 685.3902200595.

The spelling of 321968741 in words is "three hundred twenty-one million, nine hundred sixty-eight thousand, seven hundred forty-one".