326197421 has 4 divisors (see below), whose sum is σ = 355851744. Its totient is φ = 296543100.

The previous prime is 326197381. The next prime is 326197471. The reversal of 326197421 is 124791623.

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: 124791623 = 11 ⋅11344693.

It is a cyclic number.

It is not a de Polignac number, because 326197421 - 2⁶ = 326197357 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 (326197471) 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, 14827145 + ... + 14827166.

It is an arithmetic number, because the mean of its divisors is an integer number (88962936).

Almost surely, 2^326197421 is an apocalyptic number.

It is an amenable number.

326197421 is a deficient number, since it is larger than the sum of its proper divisors (29654323).

326197421 is a wasteful number, since it uses less digits than its factorization.

326197421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29654322.

The product of its digits is 18144, while the sum is 35.

The square root of 326197421 is about 18060.9363267800. The cubic root of 326197421 is about 688.3777762632.

The spelling of 326197421 in words is "three hundred twenty-six million, one hundred ninety-seven thousand, four hundred twenty-one".