726979 has 4 divisors (see below), whose sum is σ = 793080. Its totient is φ = 660880.

The previous prime is 726953. The next prime is 726983. The reversal of 726979 is 979627.

726979 = T₂₄₆ + T₂₄₇ + ... + T₂₆₇.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 979627 = 11 ⋅89057.

It is a de Polignac number, because none of the positive numbers 2^k-726979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726989) 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 3 ways as a sum of consecutive naturals, for example, 33034 + ... + 33055.

It is an arithmetic number, because the mean of its divisors is an integer number (198270).

2⁷²⁶⁹⁷⁹ is an apocalyptic number.

726979 is a deficient number, since it is larger than the sum of its proper divisors (66101).

726979 is a wasteful number, since it uses less digits than its factorization.

726979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66100.

The product of its digits is 47628, while the sum is 40.

The square root of 726979 is about 852.6306351522. The cubic root of 726979 is about 89.9167543012.

The spelling of 726979 in words is "seven hundred twenty-six thousand, nine hundred seventy-nine".