2049971887 has 2 divisors, whose sum is σ = 2049971888. Its totient is φ = 2049971886.

The previous prime is 2049971879. The next prime is 2049972007. The reversal of 2049971887 is 7881799402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2049971887 - 2³ = 2049971879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2049971827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1024985943 + 1024985944.

It is an arithmetic number, because the mean of its divisors is an integer number (1024985944).

Almost surely, 2^2049971887 is an apocalyptic number.

2049971887 is a deficient number, since it is larger than the sum of its proper divisors (1).

2049971887 is an equidigital number, since it uses as much as digits as its factorization.

2049971887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 55.

The square root of 2049971887 is about 45276.6152334734. The cubic root of 2049971887 is about 1270.3282857699.

The spelling of 2049971887 in words is "two billion, forty-nine million, nine hundred seventy-one thousand, eight hundred eighty-seven".