1900987101 has 24 divisors (see below), whose sum is σ = 2971987200. Its totient is φ = 1163945376.

The previous prime is 1900987079. The next prime is 1900987111. The reversal of 1900987101 is 1017890091.

It is not a de Polignac number, because 1900987101 - 2⁶ = 1900987037 is a prime.

It is a super-2 number, since 2×1900987101² = 7227503916336768402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1900987111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17541 + ... + 64106.

It is an arithmetic number, because the mean of its divisors is an integer number (123832800).

Almost surely, 2^1900987101 is an apocalyptic number.

It is an amenable number.

1900987101 is a deficient number, since it is larger than the sum of its proper divisors (1071000099).

1900987101 is a wasteful number, since it uses less digits than its factorization.

1900987101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81865 (or 81862 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 36.

The square root of 1900987101 is about 43600.3107901767. The cubic root of 1900987101 is about 1238.7767812886.

The spelling of 1900987101 in words is "one billion, nine hundred million, nine hundred eighty-seven thousand, one hundred one".