2140990905 has 8 divisors (see below), whose sum is σ = 3425585472. Its totient is φ = 1141861808.

The previous prime is 2140990883. The next prime is 2140990909. The reversal of 2140990905 is 5090990412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2140990905 - 2¹⁵ = 2140958137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2140990909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71366349 + ... + 71366378.

It is an arithmetic number, because the mean of its divisors is an integer number (428198184).

Almost surely, 2^2140990905 is an apocalyptic number.

It is an amenable number.

2140990905 is a deficient number, since it is larger than the sum of its proper divisors (1284594567).

2140990905 is a wasteful number, since it uses less digits than its factorization.

2140990905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142732735.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 2140990905 is about 46270.8429251078. The cubic root of 2140990905 is about 1288.8576119114.

The spelling of 2140990905 in words is "two billion, one hundred forty million, nine hundred ninety thousand, nine hundred five".