123421393 has 4 divisors (see below), whose sum is σ = 123495988. Its totient is φ = 123346800.

The previous prime is 123421391. The next prime is 123421399. The reversal of 123421393 is 393124321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 99440784 + 23980609 = 9972^2 + 4897^2 .

It is a cyclic number.

It is not a de Polignac number, because 123421393 - 2¹ = 123421391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123421391) 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, 34758 + ... + 38143.

It is an arithmetic number, because the mean of its divisors is an integer number (30873997).

Almost surely, 2^123421393 is an apocalyptic number.

It is an amenable number.

123421393 is a deficient number, since it is larger than the sum of its proper divisors (74595).

123421393 is an equidigital number, since it uses as much as digits as its factorization.

123421393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74594.

The product of its digits is 3888, while the sum is 28.

The square root of 123421393 is about 11109.5181263635. The cubic root of 123421393 is about 497.8862675286.

The spelling of 123421393 in words is "one hundred twenty-three million, four hundred twenty-one thousand, three hundred ninety-three".