79898641 has 2 divisors, whose sum is σ = 79898642. Its totient is φ = 79898640.

The previous prime is 79898633. The next prime is 79898671. The reversal of 79898641 is 14689897.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40259025 + 39639616 = 6345^2 + 6296^2 .

It is a cyclic number.

It is not a de Polignac number, because 79898641 - 2³ = 79898633 is a prime.

It is not a weakly prime, because it can be changed into another prime (79898671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39949320 + 39949321.

It is an arithmetic number, because the mean of its divisors is an integer number (39949321).

Almost surely, 2^79898641 is an apocalyptic number.

It is an amenable number.

79898641 is a deficient number, since it is larger than the sum of its proper divisors (1).

79898641 is an equidigital number, since it uses as much as digits as its factorization.

79898641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 52.

The square root of 79898641 is about 8938.6039737758. The cubic root of 79898641 is about 430.7048849770.

The spelling of 79898641 in words is "seventy-nine million, eight hundred ninety-eight thousand, six hundred forty-one".