78830501 has 2 divisors, whose sum is σ = 78830502. Its totient is φ = 78830500.

The previous prime is 78830491. The next prime is 78830503. The reversal of 78830501 is 10503887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46226401 + 32604100 = 6799^2 + 5710^2 .

It is a cyclic number.

It is not a de Polignac number, because 78830501 - 2¹⁰ = 78829477 is a prime.

It is a super-2 number, since 2×78830501² = 12428495775822002, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 78830503, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78830503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39415250 + 39415251.

It is an arithmetic number, because the mean of its divisors is an integer number (39415251).

Almost surely, 2^78830501 is an apocalyptic number.

It is an amenable number.

78830501 is a deficient number, since it is larger than the sum of its proper divisors (1).

78830501 is an equidigital number, since it uses as much as digits as its factorization.

78830501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 78830501 is about 8878.6542336100. The cubic root of 78830501 is about 428.7769482165.

The spelling of 78830501 in words is "seventy-eight million, eight hundred thirty thousand, five hundred one".