78580501 has 2 divisors, whose sum is σ = 78580502. Its totient is φ = 78580500.

The previous prime is 78580487. The next prime is 78580531. The reversal of 78580501 is 10508587.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67223601 + 11356900 = 8199^2 + 3370^2 .

It is a cyclic number.

It is not a de Polignac number, because 78580501 - 2⁹ = 78579989 is a prime.

It is a super-2 number, since 2×78580501² = 12349790274822002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78580531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39290250 + 39290251.

It is an arithmetic number, because the mean of its divisors is an integer number (39290251).

Almost surely, 2^78580501 is an apocalyptic number.

It is an amenable number.

78580501 is a deficient number, since it is larger than the sum of its proper divisors (1).

78580501 is an equidigital number, since it uses as much as digits as its factorization.

78580501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11200, while the sum is 34.

The square root of 78580501 is about 8864.5643434971. The cubic root of 78580501 is about 428.3231993377.

The spelling of 78580501 in words is "seventy-eight million, five hundred eighty thousand, five hundred one".