709297891 has 2 divisors, whose sum is σ = 709297892. Its totient is φ = 709297890.

The previous prime is 709297879. The next prime is 709297903. The reversal of 709297891 is 198792907.

It is a balanced prime because it is at equal distance from previous prime (709297879) and next prime (709297903).

It is an emirp because it is prime and its reverse (198792907) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 709297891 - 2¹¹ = 709295843 is a prime.

It is not a weakly prime, because it can be changed into another prime (709297091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 354648945 + 354648946.

It is an arithmetic number, because the mean of its divisors is an integer number (354648946).

Almost surely, 2^709297891 is an apocalyptic number.

709297891 is a deficient number, since it is larger than the sum of its proper divisors (1).

709297891 is an equidigital number, since it uses as much as digits as its factorization.

709297891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 571536, while the sum is 52.

The square root of 709297891 is about 26632.6470896154. The cubic root of 709297891 is about 891.8179777496.

The spelling of 709297891 in words is "seven hundred nine million, two hundred ninety-seven thousand, eight hundred ninety-one".