77229839 has 8 divisors (see below), whose sum is σ = 79174080. Its totient is φ = 75309696.

The previous prime is 77229797. The next prime is 77229863. The reversal of 77229839 is 93892277.

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 77229839 - 2²⁰ = 76181263 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77229793 and 77229802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77229899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554 + ... + 12440.

It is an arithmetic number, because the mean of its divisors is an integer number (9896760).

Almost surely, 2^77229839 is an apocalyptic number.

77229839 is a deficient number, since it is larger than the sum of its proper divisors (1944241).

77229839 is a wasteful number, since it uses less digits than its factorization.

77229839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12049.

The product of its digits is 381024, while the sum is 47.

The square root of 77229839 is about 8788.0509215639. The cubic root of 77229839 is about 425.8549599180.

The spelling of 77229839 in words is "seventy-seven million, two hundred twenty-nine thousand, eight hundred thirty-nine".