266938423 has 4 divisors (see below), whose sum is σ = 267008400. Its totient is φ = 266868448.

The previous prime is 266938411. The next prime is 266938439. The reversal of 266938423 is 324839662.

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 266938423 - 2²¹ = 264841271 is a prime.

It is a super-2 number, since 2×266938423² = 142512243347453858, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 266938423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266938123) 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, 28915 + ... + 37012.

It is an arithmetic number, because the mean of its divisors is an integer number (66752100).

Almost surely, 2^266938423 is an apocalyptic number.

266938423 is a deficient number, since it is larger than the sum of its proper divisors (69977).

266938423 is an equidigital number, since it uses as much as digits as its factorization.

266938423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69976.

The product of its digits is 373248, while the sum is 43.

The square root of 266938423 is about 16338.2503041176. The cubic root of 266938423 is about 643.8781637178.

The spelling of 266938423 in words is "two hundred sixty-six million, nine hundred thirty-eight thousand, four hundred twenty-three".