1266622939 has 2 divisors, whose sum is σ = 1266622940. Its totient is φ = 1266622938.

The previous prime is 1266622919. The next prime is 1266622957. The reversal of 1266622939 is 9392266621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1266622939 - 2¹⁹ = 1266098651 is a prime.

It is not a weakly prime, because it can be changed into another prime (1266622919) 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, 633311469 + 633311470.

It is an arithmetic number, because the mean of its divisors is an integer number (633311470).

Almost surely, 2^1266622939 is an apocalyptic number.

1266622939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266622939 is an equidigital number, since it uses as much as digits as its factorization.

1266622939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 46.

The square root of 1266622939 is about 35589.6465141198. The cubic root of 1266622939 is about 1081.9714046880.

The spelling of 1266622939 in words is "one billion, two hundred sixty-six million, six hundred twenty-two thousand, nine hundred thirty-nine".