871398011 has 4 divisors (see below), whose sum is σ = 950616024. Its totient is φ = 792180000.

The previous prime is 871397999. The next prime is 871398023. The reversal of 871398011 is 110893178.

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

It is an interprime number because it is at equal distance from previous prime (871397999) and next prime (871398023).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-871398011 is a prime.

It is a super-2 number, since 2×871398011² = 1518668987149512242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (871391011) 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, 39608990 + ... + 39609011.

It is an arithmetic number, because the mean of its divisors is an integer number (237654006).

Almost surely, 2^871398011 is an apocalyptic number.

871398011 is the 13202-nd centered decagonal number.

871398011 is a deficient number, since it is larger than the sum of its proper divisors (79218013).

871398011 is a wasteful number, since it uses less digits than its factorization.

871398011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79218012.

The product of its (nonzero) digits is 12096, while the sum is 38.

The square root of 871398011 is about 29519.4514007290. The cubic root of 871398011 is about 955.1513373645.

The spelling of 871398011 in words is "eight hundred seventy-one million, three hundred ninety-eight thousand, eleven".