1263981179 has 2 divisors, whose sum is σ = 1263981180. Its totient is φ = 1263981178.

The previous prime is 1263981157. The next prime is 1263981233. The reversal of 1263981179 is 9711893621.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1263981179 is a prime.

It is not a weakly prime, because it can be changed into another prime (1263981109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631990589 + 631990590.

It is an arithmetic number, because the mean of its divisors is an integer number (631990590).

Almost surely, 2^1263981179 is an apocalyptic number.

1263981179 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263981179 is an equidigital number, since it uses as much as digits as its factorization.

1263981179 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 47.

The square root of 1263981179 is about 35552.5129772847. The cubic root of 1263981179 is about 1081.2186686367.

The spelling of 1263981179 in words is "one billion, two hundred sixty-three million, nine hundred eighty-one thousand, one hundred seventy-nine".