423139903 has 4 divisors (see below), whose sum is σ = 423403848. Its totient is φ = 422875960.

The previous prime is 423139891. The next prime is 423139921. The reversal of 423139903 is 309931324.

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 423139903 - 2⁹ = 423139391 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 (423139933) 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, 129553 + ... + 132778.

It is an arithmetic number, because the mean of its divisors is an integer number (105850962).

Almost surely, 2^423139903 is an apocalyptic number.

423139903 is a deficient number, since it is larger than the sum of its proper divisors (263945).

423139903 is a wasteful number, since it uses less digits than its factorization.

423139903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263944.

The product of its (nonzero) digits is 17496, while the sum is 34.

The square root of 423139903 is about 20570.3646783425. The cubic root of 423139903 is about 750.7488242490.

The spelling of 423139903 in words is "four hundred twenty-three million, one hundred thirty-nine thousand, nine hundred three".