77950849 has 8 divisors (see below), whose sum is σ = 79115400. Its totient is φ = 76793856.

The previous prime is 77950819. The next prime is 77950867. The reversal of 77950849 is 94805977.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1703025 + 76247824 = 1305^2 + 8732^2 .

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 77950849 - 2⁷ = 77950721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77950819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20877 + ... + 24325.

It is an arithmetic number, because the mean of its divisors is an integer number (9889425).

Almost surely, 2^77950849 is an apocalyptic number.

It is an amenable number.

77950849 is a deficient number, since it is larger than the sum of its proper divisors (1164551).

77950849 is a wasteful number, since it uses less digits than its factorization.

77950849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3779.

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 77950849 is about 8828.9778004025. The cubic root of 77950849 is about 427.1761033949.

The spelling of 77950849 in words is "seventy-seven million, nine hundred fifty thousand, eight hundred forty-nine".