1903131023 has 4 divisors (see below), whose sum is σ = 1947389928. Its totient is φ = 1858872120.

The previous prime is 1903131019. The next prime is 1903131031. The reversal of 1903131023 is 3201313091.

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 1903131023 - 2² = 1903131019 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 1903131023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1903131823) 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, 22129388 + ... + 22129473.

It is an arithmetic number, because the mean of its divisors is an integer number (486847482).

Almost surely, 2^1903131023 is an apocalyptic number.

1903131023 is a deficient number, since it is larger than the sum of its proper divisors (44258905).

1903131023 is an equidigital number, since it uses as much as digits as its factorization.

1903131023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44258904.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 1903131023 is about 43624.8899482853. The cubic root of 1903131023 is about 1239.2423013693.

The spelling of 1903131023 in words is "one billion, nine hundred three million, one hundred thirty-one thousand, twenty-three".