813530887 has 8 divisors (see below), whose sum is σ = 877448880. Its totient is φ = 749804160.

The previous prime is 813530873. The next prime is 813530941. The reversal of 813530887 is 788035318.

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

It is a cyclic number.

It is not a de Polignac number, because 813530887 - 2⁷ = 813530759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813530827) 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, 38914 + ... + 56047.

It is an arithmetic number, because the mean of its divisors is an integer number (109681110).

Almost surely, 2^813530887 is an apocalyptic number.

813530887 is a deficient number, since it is larger than the sum of its proper divisors (63917993).

813530887 is a wasteful number, since it uses less digits than its factorization.

813530887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95633.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 813530887 is about 28522.4628494806. The cubic root of 813530887 is about 933.5222682847.

The spelling of 813530887 in words is "eight hundred thirteen million, five hundred thirty thousand, eight hundred eighty-seven".