77148143 has 4 divisors (see below), whose sum is σ = 77912088. Its totient is φ = 76384200.

The previous prime is 77148131. The next prime is 77148167. The reversal of 77148143 is 34184177.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77148143 - 2¹⁴ = 77131759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77118143) 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 in 3 ways as a sum of consecutive naturals, for example, 381821 + ... + 382022.

It is an arithmetic number, because the mean of its divisors is an integer number (19478022).

Almost surely, 2^77148143 is an apocalyptic number.

77148143 is a deficient number, since it is larger than the sum of its proper divisors (763945).

77148143 is a wasteful number, since it uses less digits than its factorization.

77148143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763944.

The product of its digits is 18816, while the sum is 35.

The square root of 77148143 is about 8783.4015620373. The cubic root of 77148143 is about 425.7047462959.

The spelling of 77148143 in words is "seventy-seven million, one hundred forty-eight thousand, one hundred forty-three".