801979 has 4 divisors (see below), whose sum is σ = 811080. Its totient is φ = 792880.

The previous prime is 801973. The next prime is 801989. The reversal of 801979 is 979108.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 801979 - 2⁵ = 801947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (801973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4417 + ... + 4594.

It is an arithmetic number, because the mean of its divisors is an integer number (202770).

2⁸⁰¹⁹⁷⁹ is an apocalyptic number.

801979 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

801979 is a deficient number, since it is larger than the sum of its proper divisors (9101).

801979 is an equidigital number, since it uses as much as digits as its factorization.

801979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9100.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 801979 is about 895.5328023026. The cubic root of 801979 is about 92.9082611749.

The spelling of 801979 in words is "eight hundred one thousand, nine hundred seventy-nine".