77388601 has 2 divisors, whose sum is σ = 77388602. Its totient is φ = 77388600.

The previous prime is 77388599. The next prime is 77388631. The reversal of 77388601 is 10688377.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71842576 + 5546025 = 8476^2 + 2355^2 .

It is a cyclic number.

It is not a de Polignac number, because 77388601 - 2¹ = 77388599 is a prime.

Together with 77388599, 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 (77388631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38694300 + 38694301.

It is an arithmetic number, because the mean of its divisors is an integer number (38694301).

Almost surely, 2^77388601 is an apocalyptic number.

It is an amenable number.

77388601 is a deficient number, since it is larger than the sum of its proper divisors (1).

77388601 is an equidigital number, since it uses as much as digits as its factorization.

77388601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 77388601 is about 8797.0791175253. The cubic root of 77388601 is about 426.1465713398.

The spelling of 77388601 in words is "seventy-seven million, three hundred eighty-eight thousand, six hundred one".