2011398587 has 4 divisors (see below), whose sum is σ = 2194253016. Its totient is φ = 1828544160.

The previous prime is 2011398581. The next prime is 2011398607. The reversal of 2011398587 is 7858931102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2011398587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2011398581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91427198 + ... + 91427219.

It is an arithmetic number, because the mean of its divisors is an integer number (548563254).

Almost surely, 2^2011398587 is an apocalyptic number.

2011398587 is a deficient number, since it is larger than the sum of its proper divisors (182854429).

2011398587 is a wasteful number, since it uses less digits than its factorization.

2011398587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182854428.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 2011398587 is about 44848.6185628944. The cubic root of 2011398587 is about 1262.3100703339.

The spelling of 2011398587 in words is "two billion, eleven million, three hundred ninety-eight thousand, five hundred eighty-seven".