1207822921 has 2 divisors, whose sum is σ = 1207822922. Its totient is φ = 1207822920.

The previous prime is 1207822879. The next prime is 1207822927. The reversal of 1207822921 is 1292287021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1140007696 + 67815225 = 33764^2 + 8235^2 .

It is a cyclic number.

It is not a de Polignac number, because 1207822921 - 2²⁷ = 1073605193 is a prime.

It is not a weakly prime, because it can be changed into another prime (1207822927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 603911460 + 603911461.

It is an arithmetic number, because the mean of its divisors is an integer number (603911461).

Almost surely, 2^1207822921 is an apocalyptic number.

It is an amenable number.

1207822921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1207822921 is an equidigital number, since it uses as much as digits as its factorization.

1207822921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 1207822921 is about 34753.7468627485. The cubic root of 1207822921 is about 1064.9627621121.

The spelling of 1207822921 in words is "one billion, two hundred seven million, eight hundred twenty-two thousand, nine hundred twenty-one".