40726549 has 2 divisors, whose sum is σ = 40726550. Its totient is φ = 40726548.

The previous prime is 40726541. The next prime is 40726559. The reversal of 40726549 is 94562704.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27352900 + 13373649 = 5230^2 + 3657^2 .

It is a cyclic number.

It is not a de Polignac number, because 40726549 - 2³ = 40726541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40726541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20363274 + 20363275.

It is an arithmetic number, because the mean of its divisors is an integer number (20363275).

Almost surely, 2^40726549 is an apocalyptic number.

It is an amenable number.

40726549 is a deficient number, since it is larger than the sum of its proper divisors (1).

40726549 is an equidigital number, since it uses as much as digits as its factorization.

40726549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 40726549 is about 6381.7355789785. The cubic root of 40726549 is about 344.0534130375.

The spelling of 40726549 in words is "forty million, seven hundred twenty-six thousand, five hundred forty-nine".