1208922961 has 2 divisors, whose sum is σ = 1208922962. Its totient is φ = 1208922960.

The previous prime is 1208922943. The next prime is 1208922991. The reversal of 1208922961 is 1692298021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1045875600 + 163047361 = 32340^2 + 12769^2 .

It is a cyclic number.

It is not a de Polignac number, because 1208922961 - 2¹³ = 1208914769 is a prime.

It is a super-2 number, since 2×1208922961² = 2922989451266015042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1208922991) 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, 604461480 + 604461481.

It is an arithmetic number, because the mean of its divisors is an integer number (604461481).

Almost surely, 2^1208922961 is an apocalyptic number.

It is an amenable number.

1208922961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1208922961 is an equidigital number, since it uses as much as digits as its factorization.

1208922961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 1208922961 is about 34769.5694681427. The cubic root of 1208922961 is about 1065.2859734435.

The spelling of 1208922961 in words is "one billion, two hundred eight million, nine hundred twenty-two thousand, nine hundred sixty-one".