913446021 has 4 divisors (see below), whose sum is σ = 1217928032. Its totient is φ = 608964012.

The previous prime is 913446013. The next prime is 913446067. The reversal of 913446021 is 120644319.

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 913446021 - 2³ = 913446013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 913446021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (913946021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152241001 + ... + 152241006.

It is an arithmetic number, because the mean of its divisors is an integer number (304482008).

Almost surely, 2^913446021 is an apocalyptic number.

It is an amenable number.

913446021 is a deficient number, since it is larger than the sum of its proper divisors (304482011).

913446021 is a wasteful number, since it uses less digits than its factorization.

913446021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304482010.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 913446021 is about 30223.2695286264. The cubic root of 913446021 is about 970.2737814351.

It can be divided in two parts, 9134 and 46021, that added together give a palindrome (55155).

The spelling of 913446021 in words is "nine hundred thirteen million, four hundred forty-six thousand, twenty-one".