921971269 has 2 divisors, whose sum is σ = 921971270. Its totient is φ = 921971268.

The previous prime is 921971249. The next prime is 921971311. The reversal of 921971269 is 962179129.

It is a happy number.

921971269 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 504586369 + 417384900 = 22463^2 + 20430^2 .

It is a cyclic number.

It is not a de Polignac number, because 921971269 - 2¹¹ = 921969221 is a prime.

It is a super-2 number, since 2×921971269² = 1700062041722940722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (921971249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460985634 + 460985635.

It is an arithmetic number, because the mean of its divisors is an integer number (460985635).

Almost surely, 2^921971269 is an apocalyptic number.

It is an amenable number.

921971269 is a deficient number, since it is larger than the sum of its proper divisors (1).

921971269 is an equidigital number, since it uses as much as digits as its factorization.

921971269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 46.

The square root of 921971269 is about 30363.9797951454. The cubic root of 921971269 is about 973.2829807436.

The spelling of 921971269 in words is "nine hundred twenty-one million, nine hundred seventy-one thousand, two hundred sixty-nine".