978867677 has 4 divisors (see below), whose sum is σ = 980814240. Its totient is φ = 976921116.

The previous prime is 978867623. The next prime is 978867719. The reversal of 978867677 is 776768879.

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 not a de Polignac number, because 978867677 - 2¹⁸ = 978605533 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 (978867077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 972527 + ... + 973532.

It is an arithmetic number, because the mean of its divisors is an integer number (245203560).

Almost surely, 2^978867677 is an apocalyptic number.

It is an amenable number.

978867677 is a deficient number, since it is larger than the sum of its proper divisors (1946563).

978867677 is a wasteful number, since it uses less digits than its factorization.

978867677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946562.

The product of its digits is 49787136, while the sum is 65.

The square root of 978867677 is about 31286.8610921582. The cubic root of 978867677 is about 992.9056820030.

The spelling of 978867677 in words is "nine hundred seventy-eight million, eight hundred sixty-seven thousand, six hundred seventy-seven".