1203979 has 6 divisors (see below), whose sum is σ = 1400604. Its totient is φ = 1031940.

The previous prime is 1203971. The next prime is 1204003. The reversal of 1203979 is 9793021.

It is not a de Polignac number, because 1203979 - 2³ = 1203971 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1203979.

It is not an unprimeable number, because it can be changed into a prime (1203971) 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 5 ways as a sum of consecutive naturals, for example, 12237 + ... + 12334.

It is an arithmetic number, because the mean of its divisors is an integer number (233434).

2^1203979 is an apocalyptic number.

1203979 is a deficient number, since it is larger than the sum of its proper divisors (196625).

1203979 is an equidigital number, since it uses as much as digits as its factorization.

1203979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24585 (or 24578 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 1203979 is about 1097.2597686965. The cubic root of 1203979 is about 106.3831806286.

The spelling of 1203979 in words is "one million, two hundred three thousand, nine hundred seventy-nine".