1869490905 has 16 divisors (see below), whose sum is σ = 2992939584. Its totient is φ = 996477120.

The previous prime is 1869490879. The next prime is 1869490939. The reversal of 1869490905 is 5090949681.

It is a de Polignac number, because none of the positive numbers 2^k-1869490905 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9466 + ... + 61875.

It is an arithmetic number, because the mean of its divisors is an integer number (187058724).

Almost surely, 2^1869490905 is an apocalyptic number.

1869490905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1869490905 is a deficient number, since it is larger than the sum of its proper divisors (1123448679).

1869490905 is a wasteful number, since it uses less digits than its factorization.

1869490905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73096.

The product of its (nonzero) digits is 699840, while the sum is 51.

The square root of 1869490905 is about 43237.6098437460. The cubic root of 1869490905 is about 1231.8971549420.

The spelling of 1869490905 in words is "one billion, eight hundred sixty-nine million, four hundred ninety thousand, nine hundred five".