40929989 has 2 divisors, whose sum is σ = 40929990. Its totient is φ = 40929988.

The previous prime is 40929953. The next prime is 40930051. The reversal of 40929989 is 98992904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30580900 + 10349089 = 5530^2 + 3217^2 .

It is a cyclic number.

It is not a de Polignac number, because 40929989 - 2¹² = 40925893 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40929089) 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, 20464994 + 20464995.

It is an arithmetic number, because the mean of its divisors is an integer number (20464995).

Almost surely, 2^40929989 is an apocalyptic number.

It is an amenable number.

40929989 is a deficient number, since it is larger than the sum of its proper divisors (1).

40929989 is an equidigital number, since it uses as much as digits as its factorization.

40929989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 50.

The square root of 40929989 is about 6397.6549609994. The cubic root of 40929989 is about 344.6253413725.

The spelling of 40929989 in words is "forty million, nine hundred twenty-nine thousand, nine hundred eighty-nine".