40988161 has 2 divisors, whose sum is σ = 40988162. Its totient is φ = 40988160.

The previous prime is 40988141. The next prime is 40988177. The reversal of 40988161 is 16188904.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35034561 + 5953600 = 5919^2 + 2440^2 .

It is a cyclic number.

It is not a de Polignac number, because 40988161 - 2¹³ = 40979969 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40988161.

It is not a weakly prime, because it can be changed into another prime (40988131) 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, 20494080 + 20494081.

It is an arithmetic number, because the mean of its divisors is an integer number (20494081).

Almost surely, 2^40988161 is an apocalyptic number.

It is an amenable number.

40988161 is a deficient number, since it is larger than the sum of its proper divisors (1).

40988161 is an equidigital number, since it uses as much as digits as its factorization.

40988161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 40988161 is about 6402.1997001031. The cubic root of 40988161 is about 344.7885310514.

The spelling of 40988161 in words is "forty million, nine hundred eighty-eight thousand, one hundred sixty-one".