726746437 has 2 divisors, whose sum is σ = 726746438. Its totient is φ = 726746436.

The previous prime is 726746429. The next prime is 726746459. The reversal of 726746437 is 734647627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 545736321 + 181010116 = 23361^2 + 13454^2 .

It is a cyclic number.

It is not a de Polignac number, because 726746437 - 2³ = 726746429 is a prime.

It is a Chen prime.

It is equal to p_37564867 and since 726746437 and 37564867 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726740437) 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 as a sum of consecutive naturals, namely, 363373218 + 363373219.

It is an arithmetic number, because the mean of its divisors is an integer number (363373219).

Almost surely, 2^726746437 is an apocalyptic number.

It is an amenable number.

726746437 is a deficient number, since it is larger than the sum of its proper divisors (1).

726746437 is an equidigital number, since it uses as much as digits as its factorization.

726746437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1185408, while the sum is 46.

The square root of 726746437 is about 26958.2350497951. The cubic root of 726746437 is about 899.0716505563.

The spelling of 726746437 in words is "seven hundred twenty-six million, seven hundred forty-six thousand, four hundred thirty-seven".