718289401 has 2 divisors, whose sum is σ = 718289402. Its totient is φ = 718289400.

The previous prime is 718289381. The next prime is 718289419. The reversal of 718289401 is 104982817.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 416364025 + 301925376 = 20405^2 + 17376^2 .

It is an emirp because it is prime and its reverse (104982817) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 718289401 - 2²¹ = 716192249 is a prime.

It is not a weakly prime, because it can be changed into another prime (718289441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359144700 + 359144701.

It is an arithmetic number, because the mean of its divisors is an integer number (359144701).

Almost surely, 2^718289401 is an apocalyptic number.

It is an amenable number.

718289401 is a deficient number, since it is larger than the sum of its proper divisors (1).

718289401 is an equidigital number, since it uses as much as digits as its factorization.

718289401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 718289401 is about 26800.9216446002. The cubic root of 718289401 is about 895.5705821395.

The spelling of 718289401 in words is "seven hundred eighteen million, two hundred eighty-nine thousand, four hundred one".