78082577 has 2 divisors, whose sum is σ = 78082578. Its totient is φ = 78082576.

The previous prime is 78082567. The next prime is 78082579. The reversal of 78082577 is 77528087.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64657681 + 13424896 = 8041^2 + 3664^2 .

It is a cyclic number.

It is not a de Polignac number, because 78082577 - 2⁴ = 78082561 is a prime.

Together with 78082579, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78082579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39041288 + 39041289.

It is an arithmetic number, because the mean of its divisors is an integer number (39041289).

Almost surely, 2^78082577 is an apocalyptic number.

It is an amenable number.

78082577 is a deficient number, since it is larger than the sum of its proper divisors (1).

78082577 is an equidigital number, since it uses as much as digits as its factorization.

78082577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 219520, while the sum is 44.

The square root of 78082577 is about 8836.4346316826. The cubic root of 78082577 is about 427.4165941955.

The spelling of 78082577 in words is "seventy-eight million, eighty-two thousand, five hundred seventy-seven".