76818949 has 4 divisors (see below), whose sum is σ = 77523820. Its totient is φ = 76114080.

The previous prime is 76818943. The next prime is 76818967. The reversal of 76818949 is 94981867.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94981867 = 107 ⋅887681.

It can be written as a sum of positive squares in 2 ways, for example, as 41796225 + 35022724 = 6465^2 + 5918^2 .

It is a cyclic number.

It is not a de Polignac number, because 76818949 - 2⁹ = 76818437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 76818896 and 76818905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76818943) 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, 352272 + ... + 352489.

It is an arithmetic number, because the mean of its divisors is an integer number (19380955).

Almost surely, 2^76818949 is an apocalyptic number.

It is an amenable number.

76818949 is a deficient number, since it is larger than the sum of its proper divisors (704871).

76818949 is a wasteful number, since it uses less digits than its factorization.

76818949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704870.

The product of its digits is 870912, while the sum is 52.

The square root of 76818949 is about 8764.6419778563. The cubic root of 76818949 is about 425.0983836824.

It can be divided in two parts, 76 and 818949, that added together give a square (819025 = 905²).

The spelling of 76818949 in words is "seventy-six million, eight hundred eighteen thousand, nine hundred forty-nine".