718720129 has 2 divisors, whose sum is σ = 718720130. Its totient is φ = 718720128.

The previous prime is 718720127. The next prime is 718720133. The reversal of 718720129 is 921027817.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 450415729 + 268304400 = 21223^2 + 16380^2 .

It is a cyclic number.

It is not a de Polignac number, because 718720129 - 2¹ = 718720127 is a prime.

Together with 718720127, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (718720127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359360064 + 359360065.

It is an arithmetic number, because the mean of its divisors is an integer number (359360065).

Almost surely, 2^718720129 is an apocalyptic number.

It is an amenable number.

718720129 is a deficient number, since it is larger than the sum of its proper divisors (1).

718720129 is an equidigital number, since it uses as much as digits as its factorization.

718720129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 718720129 is about 26808.9561340982. The cubic root of 718720129 is about 895.7495583968.

The spelling of 718720129 in words is "seven hundred eighteen million, seven hundred twenty thousand, one hundred twenty-nine".