78634603 has 2 divisors, whose sum is σ = 78634604. Its totient is φ = 78634602.

The previous prime is 78634579. The next prime is 78634613. The reversal of 78634603 is 30643687.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78634603 - 2⁹ = 78634091 is a prime.

It is not a weakly prime, because it can be changed into another prime (78634613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39317301 + 39317302.

It is an arithmetic number, because the mean of its divisors is an integer number (39317302).

Almost surely, 2^78634603 is an apocalyptic number.

78634603 is a deficient number, since it is larger than the sum of its proper divisors (1).

78634603 is an equidigital number, since it uses as much as digits as its factorization.

78634603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 78634603 is about 8867.6154066355. The cubic root of 78634603 is about 428.4214757349.

The spelling of 78634603 in words is "seventy-eight million, six hundred thirty-four thousand, six hundred three".