2587667881 has 2 divisors, whose sum is σ = 2587667882. Its totient is φ = 2587667880.

The previous prime is 2587667833. The next prime is 2587667909. The reversal of 2587667881 is 1887667852.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2008832400 + 578835481 = 44820^2 + 24059^2 .

It is a cyclic number.

It is not a de Polignac number, because 2587667881 - 2²³ = 2579279273 is a prime.

It is a super-2 number, since 2×2587667881² = 13392050124718060322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2587067881) 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 as a sum of consecutive naturals, namely, 1293833940 + 1293833941.

It is an arithmetic number, because the mean of its divisors is an integer number (1293833941).

Almost surely, 2^2587667881 is an apocalyptic number.

It is an amenable number.

2587667881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2587667881 is an equidigital number, since it uses as much as digits as its factorization.

2587667881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9031680, while the sum is 58.

The square root of 2587667881 is about 50869.1250268766. The cubic root of 2587667881 is about 1372.8913806261.

The spelling of 2587667881 in words is "two billion, five hundred eighty-seven million, six hundred sixty-seven thousand, eight hundred eighty-one".