2137491287 has 4 divisors (see below), whose sum is σ = 2137588776. Its totient is φ = 2137393800.

The previous prime is 2137491233. The next prime is 2137491299. The reversal of 2137491287 is 7821947312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2137491287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2137491227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1208 + ... + 65394.

It is an arithmetic number, because the mean of its divisors is an integer number (534397194).

Almost surely, 2^2137491287 is an apocalyptic number.

2137491287 is a deficient number, since it is larger than the sum of its proper divisors (97489).

2137491287 is an equidigital number, since it uses as much as digits as its factorization.

2137491287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97488.

The product of its digits is 169344, while the sum is 44.

The square root of 2137491287 is about 46233.0107931551. The cubic root of 2137491287 is about 1288.1549825641.

The spelling of 2137491287 in words is "two billion, one hundred thirty-seven million, four hundred ninety-one thousand, two hundred eighty-seven".