977999 has 8 divisors (see below), whose sum is σ = 1083648. Its totient is φ = 875160.

The previous prime is 977971. The next prime is 978001. The reversal of 977999 is 999779.

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

It is not a de Polignac number, because 977999 - 2¹⁶ = 912463 is a prime.

It is a Duffinian number.

977999 is a modest number, since divided by 999 gives 977 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (977299) 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 7 ways as a sum of consecutive naturals, for example, 74 + ... + 1400.

It is an arithmetic number, because the mean of its divisors is an integer number (135456).

2⁹⁷⁷⁹⁹⁹ is an apocalyptic number.

977999 is a deficient number, since it is larger than the sum of its proper divisors (105649).

977999 is a wasteful number, since it uses less digits than its factorization.

977999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405.

The product of its digits is 321489, while the sum is 50.

The square root of 977999 is about 988.9383196135. The cubic root of 977999 is about 99.2611883493.

The spelling of 977999 in words is "nine hundred seventy-seven thousand, nine hundred ninety-nine".