1979977 has 8 divisors (see below), whose sum is σ = 2039040. Its totient is φ = 1921920.

The previous prime is 1979947. The next prime is 1979993. The reversal of 1979977 is 7799791.

It is a happy number.

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 1979977 - 2¹¹ = 1977929 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 1979977.

It is not an unprimeable number, because it can be changed into a prime (1979947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5433 + ... + 5785.

It is an arithmetic number, because the mean of its divisors is an integer number (254880).

2^1979977 is an apocalyptic number.

It is an amenable number.

1979977 is a deficient number, since it is larger than the sum of its proper divisors (59063).

1979977 is an equidigital number, since it uses as much as digits as its factorization.

1979977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503.

The product of its digits is 250047, while the sum is 49.

The square root of 1979977 is about 1407.1165552292. The cubic root of 1979977 is about 125.5702373459.

The spelling of 1979977 in words is "one million, nine hundred seventy-nine thousand, nine hundred seventy-seven".