766972243 has 2 divisors, whose sum is σ = 766972244. Its totient is φ = 766972242.

The previous prime is 766972231. The next prime is 766972253. The reversal of 766972243 is 342279667.

It is a strong prime.

It is an emirp because it is prime and its reverse (342279667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 766972243 - 2²¹ = 764875091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 766972193 and 766972202.

It is not a weakly prime, because it can be changed into another prime (766972253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383486121 + 383486122.

It is an arithmetic number, because the mean of its divisors is an integer number (383486122).

Almost surely, 2^766972243 is an apocalyptic number.

766972243 is a deficient number, since it is larger than the sum of its proper divisors (1).

766972243 is an equidigital number, since it uses as much as digits as its factorization.

766972243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 46.

The square root of 766972243 is about 27694.2637201280. The cubic root of 766972243 is about 915.3627088801.

The spelling of 766972243 in words is "seven hundred sixty-six million, nine hundred seventy-two thousand, two hundred forty-three".