77689151 has 2 divisors, whose sum is σ = 77689152. Its totient is φ = 77689150.

The previous prime is 77689121. The next prime is 77689163. The reversal of 77689151 is 15198677.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77689151 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77689111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38844575 + 38844576.

It is an arithmetic number, because the mean of its divisors is an integer number (38844576).

Almost surely, 2^77689151 is an apocalyptic number.

77689151 is a deficient number, since it is larger than the sum of its proper divisors (1).

77689151 is an equidigital number, since it uses as much as digits as its factorization.

77689151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 44.

The square root of 77689151 is about 8814.1449386767. The cubic root of 77689151 is about 426.6975263188.

The spelling of 77689151 in words is "seventy-seven million, six hundred eighty-nine thousand, one hundred fifty-one".