723566947 has 2 divisors, whose sum is σ = 723566948. Its totient is φ = 723566946.

The previous prime is 723566917. The next prime is 723566957. The reversal of 723566947 is 749665327.

It is a strong prime.

It is an emirp because it is prime and its reverse (749665327) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 723566947 - 2¹¹ = 723564899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 723566947.

It is not a weakly prime, because it can be changed into another prime (723566917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361783473 + 361783474.

It is an arithmetic number, because the mean of its divisors is an integer number (361783474).

Almost surely, 2^723566947 is an apocalyptic number.

723566947 is a deficient number, since it is larger than the sum of its proper divisors (1).

723566947 is an equidigital number, since it uses as much as digits as its factorization.

723566947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 49.

The square root of 723566947 is about 26899.1997464609. The cubic root of 723566947 is about 897.7585982633.

The spelling of 723566947 in words is "seven hundred twenty-three million, five hundred sixty-six thousand, nine hundred forty-seven".