921059969 has 2 divisors, whose sum is σ = 921059970. Its totient is φ = 921059968.

The previous prime is 921059861. The next prime is 921059977. The reversal of 921059969 is 969950129.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 880902400 + 40157569 = 29680^2 + 6337^2 .

It is a cyclic number.

It is not a de Polignac number, because 921059969 - 2¹² = 921055873 is a prime.

It is a super-2 number, since 2×921059969² = 1696702932988561922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (921059989) 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 as a sum of consecutive naturals, namely, 460529984 + 460529985.

It is an arithmetic number, because the mean of its divisors is an integer number (460529985).

Almost surely, 2^921059969 is an apocalyptic number.

It is an amenable number.

921059969 is a deficient number, since it is larger than the sum of its proper divisors (1).

921059969 is an equidigital number, since it uses as much as digits as its factorization.

921059969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 393660, while the sum is 50.

The square root of 921059969 is about 30348.9698177714. The cubic root of 921059969 is about 972.9622024289.

The spelling of 921059969 in words is "nine hundred twenty-one million, fifty-nine thousand, nine hundred sixty-nine".