913611021 has 4 divisors (see below), whose sum is σ = 1218148032. Its totient is φ = 609074012.

The previous prime is 913610977. The next prime is 913611053. The reversal of 913611021 is 120116319.

913611021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-913611021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 913610982 and 913611000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (913611071) 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, 152268501 + ... + 152268506.

It is an arithmetic number, because the mean of its divisors is an integer number (304537008).

Almost surely, 2^913611021 is an apocalyptic number.

It is an amenable number.

913611021 is a deficient number, since it is larger than the sum of its proper divisors (304537011).

913611021 is a wasteful number, since it uses less digits than its factorization.

913611021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304537010.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 913611021 is about 30225.9990901872. Note that the first 3 decimals coincide. The cubic root of 913611021 is about 970.3321996052.

The spelling of 913611021 in words is "nine hundred thirteen million, six hundred eleven thousand, twenty-one".