249804688423 has 4 divisors (see below), whose sum is σ = 249806608048. Its totient is φ = 249802768800.

The previous prime is 249804688421. The next prime is 249804688451. The reversal of 249804688423 is 324886408942.

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

It is a cyclic number.

It is not a de Polignac number, because 249804688423 - 2¹ = 249804688421 is a prime.

It is a super-2 number, since 2×249804688423² (a number of 24 digits) 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 (249804688421) 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, 749211 + ... + 1030012.

It is an arithmetic number, because the mean of its divisors is an integer number (62451652012).

Almost surely, 2^249804688423 is an apocalyptic number.

249804688423 is a deficient number, since it is larger than the sum of its proper divisors (1919625).

249804688423 is a wasteful number, since it uses less digits than its factorization.

249804688423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919624.

The product of its (nonzero) digits is 21233664, while the sum is 58.

The spelling of 249804688423 in words is "two hundred forty-nine billion, eight hundred four million, six hundred eighty-eight thousand, four hundred twenty-three".