718501961 has 4 divisors (see below), whose sum is σ = 719256852. Its totient is φ = 717747072.

The previous prime is 718501943. The next prime is 718501963. The reversal of 718501961 is 169105817.

718501961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 430147600 + 288354361 = 20740^2 + 16981^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-718501961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (718501963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 376016 + ... + 377921.

It is an arithmetic number, because the mean of its divisors is an integer number (179814213).

Almost surely, 2^718501961 is an apocalyptic number.

It is an amenable number.

718501961 is a deficient number, since it is larger than the sum of its proper divisors (754891).

718501961 is an equidigital number, since it uses as much as digits as its factorization.

718501961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754890.

The product of its (nonzero) digits is 15120, while the sum is 38.

The square root of 718501961 is about 26804.8868865362. The cubic root of 718501961 is about 895.6589140886.

The spelling of 718501961 in words is "seven hundred eighteen million, five hundred one thousand, nine hundred sixty-one".