723705947 has 2 divisors, whose sum is σ = 723705948. Its totient is φ = 723705946.

The previous prime is 723705907. The next prime is 723706007. The reversal of 723705947 is 749507327.

It is a weak prime.

It is an emirp because it is prime and its reverse (749507327) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 723705947 - 2¹⁴ = 723689563 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 723705898 and 723705907.

It is not a weakly prime, because it can be changed into another prime (723705907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361852973 + 361852974.

It is an arithmetic number, because the mean of its divisors is an integer number (361852974).

Almost surely, 2^723705947 is an apocalyptic number.

723705947 is a deficient number, since it is larger than the sum of its proper divisors (1).

723705947 is an equidigital number, since it uses as much as digits as its factorization.

723705947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 370440, while the sum is 44.

The square root of 723705947 is about 26901.7833423734. The cubic root of 723705947 is about 897.8160822117.

The spelling of 723705947 in words is "seven hundred twenty-three million, seven hundred five thousand, nine hundred forty-seven".