365673421 has 4 divisors (see below), whose sum is σ = 365836572. Its totient is φ = 365510272.

The previous prime is 365673377. The next prime is 365673431. The reversal of 365673421 is 124376563.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124376563 = 29 ⋅4288847.

It can be written as a sum of positive squares in 2 ways, for example, as 298252900 + 67420521 = 17270^2 + 8211^2 .

It is a cyclic number.

It is not a de Polignac number, because 365673421 - 2⁷ = 365673293 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 (365673431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78166 + ... + 82711.

It is an arithmetic number, because the mean of its divisors is an integer number (91459143).

Almost surely, 2^365673421 is an apocalyptic number.

It is an amenable number.

365673421 is a deficient number, since it is larger than the sum of its proper divisors (163151).

365673421 is a wasteful number, since it uses less digits than its factorization.

365673421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163150.

The product of its digits is 90720, while the sum is 37.

The square root of 365673421 is about 19122.5892859728. The cubic root of 365673421 is about 715.0961912739.

It can be divided in two parts, 3656 and 73421, that added together give a palindrome (77077).

The spelling of 365673421 in words is "three hundred sixty-five million, six hundred seventy-three thousand, four hundred twenty-one".