726292981 has 2 divisors, whose sum is σ = 726292982. Its totient is φ = 726292980.

The previous prime is 726292979. The next prime is 726292991. The reversal of 726292981 is 189292627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 370216081 + 356076900 = 19241^2 + 18870^2 .

It is a cyclic number.

It is not a de Polignac number, because 726292981 - 2¹ = 726292979 is a prime.

It is a super-2 number, since 2×726292981² = 1055002988499732722, which contains 22 as substring.

Together with 726292979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726292961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363146490 + 363146491.

It is an arithmetic number, because the mean of its divisors is an integer number (363146491).

Almost surely, 2^726292981 is an apocalyptic number.

It is an amenable number.

726292981 is a deficient number, since it is larger than the sum of its proper divisors (1).

726292981 is an equidigital number, since it uses as much as digits as its factorization.

726292981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 46.

The square root of 726292981 is about 26949.8233945976. The cubic root of 726292981 is about 898.8846186765.

The spelling of 726292981 in words is "seven hundred twenty-six million, two hundred ninety-two thousand, nine hundred eighty-one".