1903947923 has 4 divisors (see below), whose sum is σ = 1909136160. Its totient is φ = 1898759688.

The previous prime is 1903947919. The next prime is 1903947931. The reversal of 1903947923 is 3297493091.

It is a happy number.

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 1903947923 - 2² = 1903947919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1903947943) 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, 2593568 + ... + 2594301.

It is an arithmetic number, because the mean of its divisors is an integer number (477284040).

Almost surely, 2^1903947923 is an apocalyptic number.

1903947923 is a deficient number, since it is larger than the sum of its proper divisors (5188237).

1903947923 is an equidigital number, since it uses as much as digits as its factorization.

1903947923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5188236.

The product of its (nonzero) digits is 367416, while the sum is 47.

The square root of 1903947923 is about 43634.2517181170. The cubic root of 1903947923 is about 1239.4195868028.

The spelling of 1903947923 in words is "one billion, nine hundred three million, nine hundred forty-seven thousand, nine hundred twenty-three".