77007697 has 4 divisors (see below), whose sum is σ = 82931380. Its totient is φ = 71084016.

The previous prime is 77007683. The next prime is 77007719. The reversal of 77007697 is 79670077.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49224256 + 27783441 = 7016^2 + 5271^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77007697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77007617) 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, 2961822 + ... + 2961847.

It is an arithmetic number, because the mean of its divisors is an integer number (20732845).

Almost surely, 2^77007697 is an apocalyptic number.

It is an amenable number.

77007697 is a deficient number, since it is larger than the sum of its proper divisors (5923683).

77007697 is a wasteful number, since it uses less digits than its factorization.

77007697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5923682.

The product of its (nonzero) digits is 129654, while the sum is 43.

The square root of 77007697 is about 8775.4029537110. The cubic root of 77007697 is about 425.4462615837.

The spelling of 77007697 in words is "seventy-seven million, seven thousand, six hundred ninety-seven".