718063649 has 2 divisors, whose sum is σ = 718063650. Its totient is φ = 718063648.

The previous prime is 718063613. The next prime is 718063651. The reversal of 718063649 is 946360817.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 572740624 + 145323025 = 23932^2 + 12055^2 .

It is a cyclic number.

It is not a de Polignac number, because 718063649 - 2²⁰ = 717015073 is a prime.

Together with 718063651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (718063609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359031824 + 359031825.

It is an arithmetic number, because the mean of its divisors is an integer number (359031825).

Almost surely, 2^718063649 is an apocalyptic number.

It is an amenable number.

718063649 is a deficient number, since it is larger than the sum of its proper divisors (1).

718063649 is an equidigital number, since it uses as much as digits as its factorization.

718063649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 718063649 is about 26796.7096674200. The cubic root of 718063649 is about 895.4767490066.

The spelling of 718063649 in words is "seven hundred eighteen million, sixty-three thousand, six hundred forty-nine".