78358601 has 2 divisors, whose sum is σ = 78358602. Its totient is φ = 78358600.

The previous prime is 78358597. The next prime is 78358633. The reversal of 78358601 is 10685387.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48372025 + 29986576 = 6955^2 + 5476^2 .

It is an emirp because it is prime and its reverse (10685387) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78358601 - 2² = 78358597 is a prime.

It is a super-2 number, since 2×78358601² = 12280140701354402, which contains 22 as substring.

It is a Chen prime.

It is equal to p_4579229 and since 78358601 and 4579229 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (78358681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39179300 + 39179301.

It is an arithmetic number, because the mean of its divisors is an integer number (39179301).

Almost surely, 2^78358601 is an apocalyptic number.

It is an amenable number.

78358601 is a deficient number, since it is larger than the sum of its proper divisors (1).

78358601 is an equidigital number, since it uses as much as digits as its factorization.

78358601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 78358601 is about 8852.0393695464. The cubic root of 78358601 is about 427.9196449286.

The spelling of 78358601 in words is "seventy-eight million, three hundred fifty-eight thousand, six hundred one".