76897805 has 4 divisors (see below), whose sum is σ = 92277372. Its totient is φ = 61518240.

The previous prime is 76897801. The next prime is 76897811. The reversal of 76897805 is 50879867.

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: 50879867 = 67 ⋅759401.

It can be written as a sum of positive squares in 2 ways, for example, as 17623204 + 59274601 = 4198^2 + 7699^2 .

It is not a de Polignac number, because 76897805 - 2² = 76897801 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 (76897801) 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, 7689776 + ... + 7689785.

It is an arithmetic number, because the mean of its divisors is an integer number (23069343).

Almost surely, 2^76897805 is an apocalyptic number.

It is an amenable number.

76897805 is a deficient number, since it is larger than the sum of its proper divisors (15379567).

76897805 is a wasteful number, since it uses less digits than its factorization.

76897805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15379566.

The product of its (nonzero) digits is 846720, while the sum is 50.

The square root of 76897805 is about 8769.1393534371. The cubic root of 76897805 is about 425.2437909244.

The spelling of 76897805 in words is "seventy-six million, eight hundred ninety-seven thousand, eight hundred five".