766936913 has 4 divisors (see below), whose sum is σ = 767111220. Its totient is φ = 766762608.

The previous prime is 766936901. The next prime is 766936921. The reversal of 766936913 is 319639667.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 319639667 = 31 ⋅10310957.

It can be written as a sum of positive squares in 2 ways, for example, as 168792064 + 598144849 = 12992^2 + 24457^2 .

It is a cyclic number.

It is not a de Polignac number, because 766936913 - 2²² = 762742609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (766936013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80378 + ... + 89411.

It is an arithmetic number, because the mean of its divisors is an integer number (191777805).

Almost surely, 2^766936913 is an apocalyptic number.

It is an amenable number.

766936913 is a deficient number, since it is larger than the sum of its proper divisors (174307).

766936913 is a wasteful number, since it uses less digits than its factorization.

766936913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174306.

The product of its digits is 1102248, while the sum is 50.

The square root of 766936913 is about 27693.6258550591. The cubic root of 766936913 is about 915.3486534991.

The spelling of 766936913 in words is "seven hundred sixty-six million, nine hundred thirty-six thousand, nine hundred thirteen".