1900106503 has 4 divisors (see below), whose sum is σ = 1901064760. Its totient is φ = 1899148248.

The previous prime is 1900106363. The next prime is 1900106513. The reversal of 1900106503 is 3056010091.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1900106503 is a prime.

It is a super-2 number, since 2×1900106503² = 7220809445485778018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1900106513) 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, 476148 + ... + 480121.

It is an arithmetic number, because the mean of its divisors is an integer number (475266190).

Almost surely, 2^1900106503 is an apocalyptic number.

1900106503 is a deficient number, since it is larger than the sum of its proper divisors (958257).

1900106503 is an equidigital number, since it uses as much as digits as its factorization.

1900106503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958256.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 1900106503 is about 43590.2110914825. The cubic root of 1900106503 is about 1238.5854714090.

Adding to 1900106503 its reverse (3056010091), we get a palindrome (4956116594).

The spelling of 1900106503 in words is "one billion, nine hundred million, one hundred six thousand, five hundred three".