2687019987 has 8 divisors (see below), whose sum is σ = 3600697600. Its totient is φ = 1782344520.

The previous prime is 2687019977. The next prime is 2687019997. The reversal of 2687019987 is 7899107862.

It is an interprime number because it is at equal distance from previous prime (2687019977) and next prime (2687019997).

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

It is not a de Polignac number, because 2687019987 - 2⁴ = 2687019971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2687019967) 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, 2249839 + ... + 2251032.

It is an arithmetic number, because the mean of its divisors is an integer number (450087200).

Almost surely, 2^2687019987 is an apocalyptic number.

2687019987 is a deficient number, since it is larger than the sum of its proper divisors (913677613).

2687019987 is a wasteful number, since it uses less digits than its factorization.

2687019987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4501073.

The product of its (nonzero) digits is 3048192, while the sum is 57.

The square root of 2687019987 is about 51836.4735200997. The cubic root of 2687019987 is about 1390.2416616560.

The spelling of 2687019987 in words is "two billion, six hundred eighty-seven million, nineteen thousand, nine hundred eighty-seven".