978877 has 8 divisors (see below), whose sum is σ = 1052352. Its totient is φ = 907200.

The previous prime is 978871. The next prime is 978883. The reversal of 978877 is 778879.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (978871) and next prime (978883).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 978877 - 2⁷ = 978749 is a prime.

It is a super-2 number, since 2×978877² = 1916400362258, which contains 22 as substring.

It is a Duffinian number.

978877 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 802 + ... + 1612.

It is an arithmetic number, because the mean of its divisors is an integer number (131544).

2⁹⁷⁸⁸⁷⁷ is an apocalyptic number.

It is an amenable number.

978877 is a deficient number, since it is larger than the sum of its proper divisors (73475).

978877 is a wasteful number, since it uses less digits than its factorization.

978877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899.

The product of its digits is 197568, while the sum is 46.

The square root of 978877 is about 989.3821304228. The cubic root of 978877 is about 99.2908834227.

The spelling of 978877 in words is "nine hundred seventy-eight thousand, eight hundred seventy-seven".