1011979 has 2 divisors, whose sum is σ = 1011980. Its totient is φ = 1011978.

The previous prime is 1011973. The next prime is 1012007. The reversal of 1011979 is 9791101.

It is an a-pointer prime, because the next prime (1012007) can be obtained adding 1011979 to its sum of digits (28).

It is a weak prime.

It is an emirp because it is prime and its reverse (9791101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1011979 - 2⁵ = 1011947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1011973) 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 as a sum of consecutive naturals, namely, 505989 + 505990.

It is an arithmetic number, because the mean of its divisors is an integer number (505990).

2^1011979 is an apocalyptic number.

1011979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011979 is an equidigital number, since it uses as much as digits as its factorization.

1011979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 567, while the sum is 28.

The square root of 1011979 is about 1005.9716695812. The cubic root of 1011979 is about 100.3977161219.

It can be divided in two parts, 101 and 1979, that added together give a triangular number (2080 = T₆₄).

The spelling of 1011979 in words is "one million, eleven thousand, nine hundred seventy-nine".