911948021 has 4 divisors (see below), whose sum is σ = 912055200. Its totient is φ = 911840844.

The previous prime is 911947979. The next prime is 911948033. The reversal of 911948021 is 120849119.

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 not a de Polignac number, because 911948021 - 2⁶ = 911947957 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 (911941021) 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, 39611 + ... + 58248.

It is an arithmetic number, because the mean of its divisors is an integer number (228013800).

Almost surely, 2^911948021 is an apocalyptic number.

It is an amenable number.

911948021 is a deficient number, since it is larger than the sum of its proper divisors (107179).

911948021 is an equidigital number, since it uses as much as digits as its factorization.

911948021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107178.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 911948021 is about 30198.4771304780. The cubic root of 911948021 is about 969.7430931213.

The spelling of 911948021 in words is "nine hundred eleven million, nine hundred forty-eight thousand, twenty-one".