365993421 has 4 divisors (see below), whose sum is σ = 487991232. Its totient is φ = 243995612.

The previous prime is 365993413. The next prime is 365993423. The reversal of 365993421 is 124399563.

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: 124399563 = 3 ⋅41466521.

It is a cyclic number.

It is not a de Polignac number, because 365993421 - 2³ = 365993413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (365993423) 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, 60998901 + ... + 60998906.

It is an arithmetic number, because the mean of its divisors is an integer number (121997808).

Almost surely, 2^365993421 is an apocalyptic number.

It is an amenable number.

365993421 is a deficient number, since it is larger than the sum of its proper divisors (121997811).

365993421 is a wasteful number, since it uses less digits than its factorization.

365993421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121997810.

The product of its digits is 174960, while the sum is 42.

The square root of 365993421 is about 19130.9545240168. The cubic root of 365993421 is about 715.3047234875.

The spelling of 365993421 in words is "three hundred sixty-five million, nine hundred ninety-three thousand, four hundred twenty-one".