78598013 has 6 divisors (see below), whose sum is σ = 85109274. Its totient is φ = 72551856.

The previous prime is 78598007. The next prime is 78598019. The reversal of 78598013 is 31089587.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78598007) and next prime (78598019).

It can be written as a sum of positive squares in 3 ways, for example, as 840889 + 77757124 = 917^2 + 8818^2 .

It is not a de Polignac number, because 78598013 - 2⁴ = 78597997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78598019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 232370 + ... + 232707.

It is an arithmetic number, because the mean of its divisors is an integer number (14184879).

Almost surely, 2^78598013 is an apocalyptic number.

It is an amenable number.

78598013 is a deficient number, since it is larger than the sum of its proper divisors (6511261).

78598013 is a wasteful number, since it uses less digits than its factorization.

78598013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465103 (or 465090 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 78598013 is about 8865.5520414693. The cubic root of 78598013 is about 428.3550148587.

The spelling of 78598013 in words is "seventy-eight million, five hundred ninety-eight thousand, thirteen".