80647493 has 2 divisors, whose sum is σ = 80647494. Its totient is φ = 80647492.

The previous prime is 80647481. The next prime is 80647529. The reversal of 80647493 is 39474608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71605444 + 9042049 = 8462^2 + 3007^2 .

It is a cyclic number.

It is not a de Polignac number, because 80647493 - 2⁴ = 80647477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80647493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80647423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40323746 + 40323747.

It is an arithmetic number, because the mean of its divisors is an integer number (40323747).

Almost surely, 2^80647493 is an apocalyptic number.

It is an amenable number.

80647493 is a deficient number, since it is larger than the sum of its proper divisors (1).

80647493 is an equidigital number, since it uses as much as digits as its factorization.

80647493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 80647493 is about 8980.3949245008. The cubic root of 80647493 is about 432.0463002644.

The spelling of 80647493 in words is "eighty million, six hundred forty-seven thousand, four hundred ninety-three".