726601949 has 2 divisors, whose sum is σ = 726601950. Its totient is φ = 726601948.

The previous prime is 726601943. The next prime is 726601951. The reversal of 726601949 is 949106627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 714225625 + 12376324 = 26725^2 + 3518^2 .

It is a cyclic number.

It is not a de Polignac number, because 726601949 - 2⁸ = 726601693 is a prime.

Together with 726601951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726601943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363300974 + 363300975.

It is an arithmetic number, because the mean of its divisors is an integer number (363300975).

Almost surely, 2^726601949 is an apocalyptic number.

It is an amenable number.

726601949 is a deficient number, since it is larger than the sum of its proper divisors (1).

726601949 is an equidigital number, since it uses as much as digits as its factorization.

726601949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 726601949 is about 26955.5550675552. Note that the first 3 decimals coincide. The cubic root of 726601949 is about 899.0120636688.

The spelling of 726601949 in words is "seven hundred twenty-six million, six hundred one thousand, nine hundred forty-nine".