827987313 has 4 divisors (see below), whose sum is σ = 1103983088. Its totient is φ = 551991540.

The previous prime is 827987309. The next prime is 827987411. The reversal of 827987313 is 313789728.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 827987313 - 2² = 827987309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (827987513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137997883 + ... + 137997888.

It is an arithmetic number, because the mean of its divisors is an integer number (275995772).

Almost surely, 2^827987313 is an apocalyptic number.

It is an amenable number.

827987313 is a deficient number, since it is larger than the sum of its proper divisors (275995775).

827987313 is a wasteful number, since it uses less digits than its factorization.

827987313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275995774.

The product of its digits is 508032, while the sum is 48.

The square root of 827987313 is about 28774.7686871676. The cubic root of 827987313 is about 939.0193912212.

The spelling of 827987313 in words is "eight hundred twenty-seven million, nine hundred eighty-seven thousand, three hundred thirteen".