77650427 has 2 divisors, whose sum is σ = 77650428. Its totient is φ = 77650426.

The previous prime is 77650423. The next prime is 77650451. The reversal of 77650427 is 72405677.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77650427 - 2² = 77650423 is a prime.

It is not a weakly prime, because it can be changed into another prime (77650423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38825213 + 38825214.

It is an arithmetic number, because the mean of its divisors is an integer number (38825214).

Almost surely, 2^77650427 is an apocalyptic number.

77650427 is a deficient number, since it is larger than the sum of its proper divisors (1).

77650427 is an equidigital number, since it uses as much as digits as its factorization.

77650427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82320, while the sum is 38.

The square root of 77650427 is about 8811.9479685255. The cubic root of 77650427 is about 426.6266190304.

The spelling of 77650427 in words is "seventy-seven million, six hundred fifty thousand, four hundred twenty-seven".