726949381 has 2 divisors, whose sum is σ = 726949382. Its totient is φ = 726949380.

The previous prime is 726949373. The next prime is 726949387. The reversal of 726949381 is 183949627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 704053156 + 22896225 = 26534^2 + 4785^2 .

It is a cyclic number.

It is not a de Polignac number, because 726949381 - 2³ = 726949373 is a prime.

It is a super-2 number, since 2×726949381² = 1056910805072566322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726949387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363474690 + 363474691.

It is an arithmetic number, because the mean of its divisors is an integer number (363474691).

Almost surely, 2^726949381 is an apocalyptic number.

It is an amenable number.

726949381 is a deficient number, since it is larger than the sum of its proper divisors (1).

726949381 is an equidigital number, since it uses as much as digits as its factorization.

726949381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 49.

The square root of 726949381 is about 26961.9988316890. The cubic root of 726949381 is about 899.1553313773.

The spelling of 726949381 in words is "seven hundred twenty-six million, nine hundred forty-nine thousand, three hundred eighty-one".