79698491 has 2 divisors, whose sum is σ = 79698492. Its totient is φ = 79698490.

The previous prime is 79698457. The next prime is 79698529. The reversal of 79698491 is 19489697.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79698491 - 2¹⁴ = 79682107 is a prime.

It is not a weakly prime, because it can be changed into another prime (79694491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39849245 + 39849246.

It is an arithmetic number, because the mean of its divisors is an integer number (39849246).

Almost surely, 2^79698491 is an apocalyptic number.

79698491 is a deficient number, since it is larger than the sum of its proper divisors (1).

79698491 is an equidigital number, since it uses as much as digits as its factorization.

79698491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 53.

The square root of 79698491 is about 8927.4011335887. The cubic root of 79698491 is about 430.3449386539.

The spelling of 79698491 in words is "seventy-nine million, six hundred ninety-eight thousand, four hundred ninety-one".