423745157 has 4 divisors (see below), whose sum is σ = 462267456. Its totient is φ = 385222860.

The previous prime is 423745103. The next prime is 423745159. The reversal of 423745157 is 751547324.

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.

It is not a de Polignac number, because 423745157 - 2²⁰ = 422696581 is a prime.

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 423745157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423745159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19261133 + ... + 19261154.

It is an arithmetic number, because the mean of its divisors is an integer number (115566864).

Almost surely, 2^423745157 is an apocalyptic number.

It is an amenable number.

423745157 is a deficient number, since it is larger than the sum of its proper divisors (38522299).

423745157 is a wasteful number, since it uses less digits than its factorization.

423745157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38522298.

The product of its digits is 117600, while the sum is 38.

The square root of 423745157 is about 20585.0712167823. The cubic root of 423745157 is about 751.1066076083.

It can be divided in two parts, 4237 and 45157, that added together give a palindrome (49394).

The spelling of 423745157 in words is "four hundred twenty-three million, seven hundred forty-five thousand, one hundred fifty-seven".