726949121 has 8 divisors (see below), whose sum is σ = 770042880. Its totient is φ = 683892288.

The previous prime is 726949079. The next prime is 726949123. The reversal of 726949121 is 121949627.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-726949121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (726949123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38360 + ... + 54086.

It is an arithmetic number, because the mean of its divisors is an integer number (96255360).

Almost surely, 2^726949121 is an apocalyptic number.

It is an amenable number.

726949121 is a deficient number, since it is larger than the sum of its proper divisors (43093759).

726949121 is a wasteful number, since it uses less digits than its factorization.

726949121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18463.

The product of its digits is 54432, while the sum is 41.

The square root of 726949121 is about 26961.9940100876. The cubic root of 726949121 is about 899.1552241803.

The spelling of 726949121 in words is "seven hundred twenty-six million, nine hundred forty-nine thousand, one hundred twenty-one".