677988697 has 4 divisors (see below), whose sum is σ = 693755920. Its totient is φ = 662221476.

The previous prime is 677988691. The next prime is 677988721. The reversal of 677988697 is 796889776.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-677988697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (677988691) 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, 7883547 + ... + 7883632.

It is an arithmetic number, because the mean of its divisors is an integer number (173438980).

Almost surely, 2^677988697 is an apocalyptic number.

It is an amenable number.

677988697 is a deficient number, since it is larger than the sum of its proper divisors (15767223).

677988697 is a wasteful number, since it uses less digits than its factorization.

677988697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15767222.

The product of its digits is 64012032, while the sum is 67.

The square root of 677988697 is about 26038.2160871285. The cubic root of 677988697 is about 878.4980824688.

The spelling of 677988697 in words is "six hundred seventy-seven million, nine hundred eighty-eight thousand, six hundred ninety-seven".