40147889 has 2 divisors, whose sum is σ = 40147890. Its totient is φ = 40147888.

The previous prime is 40147831. The next prime is 40147909. The reversal of 40147889 is 98874104.

It is a happy number.

40147889 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., 35343025 + 4804864 = 5945^2 + 2192^2 .

It is a cyclic number.

It is not a de Polignac number, because 40147889 - 2²⁴ = 23370673 is a prime.

It is a super-2 number, since 2×40147889² = 3223705982312642, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (40143889) 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, 20073944 + 20073945.

It is an arithmetic number, because the mean of its divisors is an integer number (20073945).

Almost surely, 2^40147889 is an apocalyptic number.

It is an amenable number.

40147889 is a deficient number, since it is larger than the sum of its proper divisors (1).

40147889 is an equidigital number, since it uses as much as digits as its factorization.

40147889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 40147889 is about 6336.2361856231. The cubic root of 40147889 is about 342.4161486883.

The spelling of 40147889 in words is "forty million, one hundred forty-seven thousand, eight hundred eighty-nine".