78908497 has 2 divisors, whose sum is σ = 78908498. Its totient is φ = 78908496.

The previous prime is 78908437. The next prime is 78908503. The reversal of 78908497 is 79480987.

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., 74028816 + 4879681 = 8604^2 + 2209^2 .

It is a cyclic number.

It is not a de Polignac number, because 78908497 - 2⁷ = 78908369 is a prime.

It is not a weakly prime, because it can be changed into another prime (78908437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39454248 + 39454249.

It is an arithmetic number, because the mean of its divisors is an integer number (39454249).

Almost surely, 2^78908497 is an apocalyptic number.

It is an amenable number.

78908497 is a deficient number, since it is larger than the sum of its proper divisors (1).

78908497 is an equidigital number, since it uses as much as digits as its factorization.

78908497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1016064, while the sum is 52.

The square root of 78908497 is about 8883.0454800142. The cubic root of 78908497 is about 428.9183142397.

The spelling of 78908497 in words is "seventy-eight million, nine hundred eight thousand, four hundred ninety-seven".