77143147 has 2 divisors, whose sum is σ = 77143148. Its totient is φ = 77143146.

The previous prime is 77143123. The next prime is 77143151. The reversal of 77143147 is 74134177.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77143147 - 2⁷ = 77143019 is a prime.

It is not a weakly prime, because it can be changed into another prime (77143117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38571573 + 38571574.

It is an arithmetic number, because the mean of its divisors is an integer number (38571574).

Almost surely, 2^77143147 is an apocalyptic number.

77143147 is a deficient number, since it is larger than the sum of its proper divisors (1).

77143147 is an equidigital number, since it uses as much as digits as its factorization.

77143147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16464, while the sum is 34.

The square root of 77143147 is about 8783.1171573650. The cubic root of 77143147 is about 425.6955567603.

The spelling of 77143147 in words is "seventy-seven million, one hundred forty-three thousand, one hundred forty-seven".