913363821 has 6 divisors (see below), whose sum is σ = 1319303310. Its totient is φ = 608909208.

The previous prime is 913363813. The next prime is 913363823. The reversal of 913363821 is 128363319.

913363821 is a `hidden beast` number, since 9 + 13 + 3 + 638 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 911375721 + 1988100 = 30189^2 + 1410^2 .

It is not a de Polignac number, because 913363821 - 2³ = 913363813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (913363823) 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 in 5 ways as a sum of consecutive naturals, for example, 50742426 + ... + 50742443.

It is an arithmetic number, because the mean of its divisors is an integer number (219883885).

Almost surely, 2^913363821 is an apocalyptic number.

It is an amenable number.

913363821 is a deficient number, since it is larger than the sum of its proper divisors (405939489).

913363821 is a wasteful number, since it uses less digits than its factorization.

913363821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101484875 (or 101484872 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 913363821 is about 30221.9096186856. The cubic root of 913363821 is about 970.2446759395.

The spelling of 913363821 in words is "nine hundred thirteen million, three hundred sixty-three thousand, eight hundred twenty-one".