766743139 has 2 divisors, whose sum is σ = 766743140. Its totient is φ = 766743138.

The previous prime is 766743137. The next prime is 766743161. The reversal of 766743139 is 931347667.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 766743139 - 2¹ = 766743137 is a prime.

Together with 766743137, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (766743137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383371569 + 383371570.

It is an arithmetic number, because the mean of its divisors is an integer number (383371570).

Almost surely, 2^766743139 is an apocalyptic number.

766743139 is a deficient number, since it is larger than the sum of its proper divisors (1).

766743139 is an equidigital number, since it uses as much as digits as its factorization.

766743139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 46.

The square root of 766743139 is about 27690.1271033558. The cubic root of 766743139 is about 915.2715564536.

The spelling of 766743139 in words is "seven hundred sixty-six million, seven hundred forty-three thousand, one hundred thirty-nine".