76699109 has 4 divisors (see below), whose sum is σ = 78146316. Its totient is φ = 75251904.

The previous prime is 76699081. The next prime is 76699141. The reversal of 76699109 is 90199667.

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: 90199667 = 2213 ⋅40759.

It can be written as a sum of positive squares in 2 ways, for example, as 57532225 + 19166884 = 7585^2 + 4378^2 .

It is a cyclic number.

It is not a de Polignac number, because 76699109 - 2²⁴ = 59921893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76699709) 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 3 ways as a sum of consecutive naturals, for example, 723524 + ... + 723629.

It is an arithmetic number, because the mean of its divisors is an integer number (19536579).

Almost surely, 2^76699109 is an apocalyptic number.

It is an amenable number.

76699109 is a deficient number, since it is larger than the sum of its proper divisors (1447207).

76699109 is a wasteful number, since it uses less digits than its factorization.

76699109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447206.

The product of its (nonzero) digits is 183708, while the sum is 47.

The square root of 76699109 is about 8757.8027495485. The cubic root of 76699109 is about 424.8772129718.

The spelling of 76699109 in words is "seventy-six million, six hundred ninety-nine thousand, one hundred nine".