78598493 has 2 divisors, whose sum is σ = 78598494. Its totient is φ = 78598492.

The previous prime is 78598451. The next prime is 78598501. The reversal of 78598493 is 39489587.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65254084 + 13344409 = 8078^2 + 3653^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78598493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78198493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39299246 + 39299247.

It is an arithmetic number, because the mean of its divisors is an integer number (39299247).

Almost surely, 2^78598493 is an apocalyptic number.

It is an amenable number.

78598493 is a deficient number, since it is larger than the sum of its proper divisors (1).

78598493 is an equidigital number, since it uses as much as digits as its factorization.

78598493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 53.

The square root of 78598493 is about 8865.5791125002. The cubic root of 78598493 is about 428.3558868484.

The spelling of 78598493 in words is "seventy-eight million, five hundred ninety-eight thousand, four hundred ninety-three".