77144441 has 4 divisors (see below), whose sum is σ = 84157584. Its totient is φ = 70131300.

The previous prime is 77144401. The next prime is 77144449. The reversal of 77144441 is 14444177.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 77144441 - 2⁶ = 77144377 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77144398 and 77144407.

It is not an unprimeable number, because it can be changed into a prime (77144449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3506555 + ... + 3506576.

It is an arithmetic number, because the mean of its divisors is an integer number (21039396).

Almost surely, 2^77144441 is an apocalyptic number.

It is an amenable number.

77144441 is a deficient number, since it is larger than the sum of its proper divisors (7013143).

77144441 is a wasteful number, since it uses less digits than its factorization.

77144441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7013142.

The product of its digits is 12544, while the sum is 32.

The square root of 77144441 is about 8783.1908211082. The cubic root of 77144441 is about 425.6979369543.

The spelling of 77144441 in words is "seventy-seven million, one hundred forty-four thousand, four hundred forty-one".