77020147 has 2 divisors, whose sum is σ = 77020148. Its totient is φ = 77020146.

The previous prime is 77020121. The next prime is 77020157. The reversal of 77020147 is 74102077.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77020147 - 2²³ = 68631539 is a prime.

It is equal to p_4505680 and since 77020147 and 4505680 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (77020157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38510073 + 38510074.

It is an arithmetic number, because the mean of its divisors is an integer number (38510074).

Almost surely, 2^77020147 is an apocalyptic number.

77020147 is a deficient number, since it is larger than the sum of its proper divisors (1).

77020147 is an equidigital number, since it uses as much as digits as its factorization.

77020147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2744, while the sum is 28.

The square root of 77020147 is about 8776.1122941767. The cubic root of 77020147 is about 425.4691879522.

The spelling of 77020147 in words is "seventy-seven million, twenty thousand, one hundred forty-seven".