77648143 has 4 divisors (see below), whose sum is σ = 77752288. Its totient is φ = 77544000.

The previous prime is 77648119. The next prime is 77648159. The reversal of 77648143 is 34184677.

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 77648143 - 2⁵ = 77648111 is a prime.

It is a super-2 number, since 2×77648143² = 12058468222696898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77648096 and 77648105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77648113) 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 3 ways as a sum of consecutive naturals, for example, 50946 + ... + 52447.

It is an arithmetic number, because the mean of its divisors is an integer number (19438072).

Almost surely, 2^77648143 is an apocalyptic number.

77648143 is a deficient number, since it is larger than the sum of its proper divisors (104145).

77648143 is a wasteful number, since it uses less digits than its factorization.

77648143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104144.

The product of its digits is 112896, while the sum is 40.

The square root of 77648143 is about 8811.8183708018. The cubic root of 77648143 is about 426.6224360752.

The spelling of 77648143 in words is "seventy-seven million, six hundred forty-eight thousand, one hundred forty-three".