77049839 has 16 divisors (see below), whose sum is σ = 84395520. Its totient is φ = 70113120.

The previous prime is 77049827. The next prime is 77049853. The reversal of 77049839 is 93894077.

It is a cyclic number.

It is not a de Polignac number, because 77049839 - 2⁴ = 77049823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77049793 and 77049802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77049859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46544 + ... + 48170.

It is an arithmetic number, because the mean of its divisors is an integer number (5274720).

Almost surely, 2^77049839 is an apocalyptic number.

77049839 is a deficient number, since it is larger than the sum of its proper divisors (7345681).

77049839 is a wasteful number, since it uses less digits than its factorization.

77049839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750.

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

The square root of 77049839 is about 8777.8037685972. The cubic root of 77049839 is about 425.5238550689.

The spelling of 77049839 in words is "seventy-seven million, forty-nine thousand, eight hundred thirty-nine".