40557793 has 2 divisors, whose sum is σ = 40557794. Its totient is φ = 40557792.

The previous prime is 40557791. The next prime is 40557833. The reversal of 40557793 is 39775504.

It is an a-pointer prime, because the next prime (40557833) can be obtained adding 40557793 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39037504 + 1520289 = 6248^2 + 1233^2 .

It is a cyclic number.

It is not a de Polignac number, because 40557793 - 2¹ = 40557791 is a prime.

Together with 40557791, it forms a pair of twin primes.

It is the 6369-th Hogben number.

It is not a weakly prime, because it can be changed into another prime (40557791) by changing a digit.

It is a nontrivial repunit in base 6368.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20278896 + 20278897.

It is an arithmetic number, because the mean of its divisors is an integer number (20278897).

Almost surely, 2^40557793 is an apocalyptic number.

It is an amenable number.

40557793 is a deficient number, since it is larger than the sum of its proper divisors (1).

40557793 is an equidigital number, since it uses as much as digits as its factorization.

40557793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 132300, while the sum is 40.

The square root of 40557793 is about 6368.5000588836. The cubic root of 40557793 is about 343.5775444376.

The spelling of 40557793 in words is "forty million, five hundred fifty-seven thousand, seven hundred ninety-three".