921414892681 has 4 divisors (see below), whose sum is σ = 921416814864. Its totient is φ = 921412970500.

The previous prime is 921414892639. The next prime is 921414892691. The reversal of 921414892681 is 186298414129.

921414892681 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 not a de Polignac number, because 921414892681 - 2¹⁹ = 921414368393 is a prime.

It is a super-2 number, since 2×921414892681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (921414892691) 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, 408906 + ... + 1417756.

It is an arithmetic number, because the mean of its divisors is an integer number (230354203716).

Almost surely, 2^921414892681 is an apocalyptic number.

It is an amenable number.

921414892681 is a deficient number, since it is larger than the sum of its proper divisors (1922183).

921414892681 is a wasteful number, since it uses less digits than its factorization.

921414892681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1922182.

The product of its digits is 1990656, while the sum is 55.

The spelling of 921414892681 in words is "nine hundred twenty-one billion, four hundred fourteen million, eight hundred ninety-two thousand, six hundred eighty-one".