77144243 has 8 divisors (see below), whose sum is σ = 84381696. Its totient is φ = 69944200.

The previous prime is 77144227. The next prime is 77144257. The reversal of 77144243 is 34244177.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77144243 - 2⁴ = 77144227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77144293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4943 + ... + 13368.

It is an arithmetic number, because the mean of its divisors is an integer number (10547712).

Almost surely, 2^77144243 is an apocalyptic number.

77144243 is a deficient number, since it is larger than the sum of its proper divisors (7237453).

77144243 is a wasteful number, since it uses less digits than its factorization.

77144243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18705.

The product of its digits is 18816, while the sum is 32.

The square root of 77144243 is about 8783.1795495709. The cubic root of 77144243 is about 425.6975727533.

The spelling of 77144243 in words is "seventy-seven million, one hundred forty-four thousand, two hundred forty-three".