40739989 has 2 divisors, whose sum is σ = 40739990. Its totient is φ = 40739988.

The previous prime is 40739957. The next prime is 40739999. The reversal of 40739989 is 98993704.

40739989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29517489 + 11222500 = 5433^2 + 3350^2 .

It is a cyclic number.

It is not a de Polignac number, because 40739989 - 2⁵ = 40739957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40739999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20369994 + 20369995.

It is an arithmetic number, because the mean of its divisors is an integer number (20369995).

Almost surely, 2^40739989 is an apocalyptic number.

It is an amenable number.

40739989 is a deficient number, since it is larger than the sum of its proper divisors (1).

40739989 is an equidigital number, since it uses as much as digits as its factorization.

40739989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 40739989 is about 6382.7884972009. The cubic root of 40739989 is about 344.0912554230.

The spelling of 40739989 in words is "forty million, seven hundred thirty-nine thousand, nine hundred eighty-nine".