78454697 has 2 divisors, whose sum is σ = 78454698. Its totient is φ = 78454696.

The previous prime is 78454669. The next prime is 78454699. The reversal of 78454697 is 79645487.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57395776 + 21058921 = 7576^2 + 4589^2 .

It is an emirp because it is prime and its reverse (79645487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78454697 - 2¹⁶ = 78389161 is a prime.

Together with 78454699, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78454699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39227348 + 39227349.

It is an arithmetic number, because the mean of its divisors is an integer number (39227349).

Almost surely, 2^78454697 is an apocalyptic number.

It is an amenable number.

78454697 is a deficient number, since it is larger than the sum of its proper divisors (1).

78454697 is an equidigital number, since it uses as much as digits as its factorization.

78454697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 50.

The square root of 78454697 is about 8857.4656081748. The cubic root of 78454697 is about 428.0945015801.

The spelling of 78454697 in words is "seventy-eight million, four hundred fifty-four thousand, six hundred ninety-seven".