1172868311 has 2 divisors, whose sum is σ = 1172868312. Its totient is φ = 1172868310.

The previous prime is 1172868227. The next prime is 1172868317. The reversal of 1172868311 is 1138682711.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1172868311 - 2²² = 1168674007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1172868317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 586434155 + 586434156.

It is an arithmetic number, because the mean of its divisors is an integer number (586434156).

Almost surely, 2^1172868311 is an apocalyptic number.

1172868311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1172868311 is an equidigital number, since it uses as much as digits as its factorization.

1172868311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 38.

The square root of 1172868311 is about 34247.1650067564. The cubic root of 1172868311 is about 1054.5886287275.

The spelling of 1172868311 in words is "one billion, one hundred seventy-two million, eight hundred sixty-eight thousand, three hundred eleven".