1197979 has 8 divisors (see below), whose sum is σ = 1249920. Its totient is φ = 1147200.

The previous prime is 1197971. The next prime is 1197997. The reversal of 1197979 is 9797911.

1197979 = T₁₀ + T₁₁ + ... + T₁₉₂.

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 1197979 - 2³ = 1197971 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1197971) 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, 2262 + ... + 2740.

It is an arithmetic number, because the mean of its divisors is an integer number (156240).

2^1197979 is an apocalyptic number.

1197979 is a deficient number, since it is larger than the sum of its proper divisors (51941).

1197979 is an equidigital number, since it uses as much as digits as its factorization.

1197979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581.

The product of its digits is 35721, while the sum is 43.

The square root of 1197979 is about 1094.5222702166. The cubic root of 1197979 is about 106.2061669251.

The spelling of 1197979 in words is "one million, one hundred ninety-seven thousand, nine hundred seventy-nine".