77849953 has 6 divisors (see below), whose sum is σ = 82699046. Its totient is φ = 73270272.

The previous prime is 77849929. The next prime is 77849957. The reversal of 77849953 is 35994877.

It can be written as a sum of positive squares in 3 ways, for example, as 60109009 + 17740944 = 7753^2 + 4212^2 .

It is not a de Polignac number, because 77849953 - 2⁵ = 77849921 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77849953.

It is not an unprimeable number, because it can be changed into a prime (77849957) 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 5 ways as a sum of consecutive naturals, for example, 134400 + ... + 134977.

Almost surely, 2^77849953 is an apocalyptic number.

It is an amenable number.

77849953 is a deficient number, since it is larger than the sum of its proper divisors (4849093).

77849953 is a wasteful number, since it uses less digits than its factorization.

77849953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269411 (or 269394 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 52.

The square root of 77849953 is about 8823.2620384980. The cubic root of 77849953 is about 426.9917181069.

The spelling of 77849953 in words is "seventy-seven million, eight hundred forty-nine thousand, nine hundred fifty-three".