1900001005 has 64 divisors (see below), whose sum is σ = 2866544640. Its totient is φ = 1178956800.

The previous prime is 1900000987. The next prime is 1900001009. The reversal of 1900001005 is 5001000091.

It is not a de Polignac number, because 1900001005 - 2⁷ = 1900000877 is a prime.

It is a super-2 number, since 2×1900001005² = 7220007638002020050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1900001005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1900001009) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4408140 + ... + 4408570.

It is an arithmetic number, because the mean of its divisors is an integer number (44789760).

Almost surely, 2^1900001005 is an apocalyptic number.

It is an amenable number.

1900001005 is a deficient number, since it is larger than the sum of its proper divisors (966543635).

1900001005 is a wasteful number, since it uses less digits than its factorization.

1900001005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730.

The product of its (nonzero) digits is 45, while the sum is 16.

The square root of 1900001005 is about 43589.0009635458. Note that the first 3 decimals coincide. The cubic root of 1900001005 is about 1238.5625480082.

Adding to 1900001005 its reverse (5001000091), we get a palindrome (6901001096).

The spelling of 1900001005 in words is "one billion, nine hundred million, one thousand, five".