40988993 has 2 divisors, whose sum is σ = 40988994. Its totient is φ = 40988992.

The previous prime is 40988957. The next prime is 40989041. The reversal of 40988993 is 39988904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30283009 + 10705984 = 5503^2 + 3272^2 .

It is a cyclic number.

It is not a de Polignac number, because 40988993 - 2¹² = 40984897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40988923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20494496 + 20494497.

It is an arithmetic number, because the mean of its divisors is an integer number (20494497).

Almost surely, 2^40988993 is an apocalyptic number.

It is an amenable number.

40988993 is a deficient number, since it is larger than the sum of its proper divisors (1).

40988993 is an equidigital number, since it uses as much as digits as its factorization.

40988993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 40988993 is about 6402.2646774403. The cubic root of 40988993 is about 344.7908639373.

The spelling of 40988993 in words is "forty million, nine hundred eighty-eight thousand, nine hundred ninety-three".