40231889 has 2 divisors, whose sum is σ = 40231890. Its totient is φ = 40231888.

The previous prime is 40231837. The next prime is 40231897. The reversal of 40231889 is 98813204.

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., 39753025 + 478864 = 6305^2 + 692^2 .

It is a cyclic number.

It is not a de Polignac number, because 40231889 - 2¹⁶ = 40166353 is a prime.

It is equal to p_2446865 and since 40231889 and 2446865 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40231819) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20115944 + 20115945.

It is an arithmetic number, because the mean of its divisors is an integer number (20115945).

Almost surely, 2^40231889 is an apocalyptic number.

It is an amenable number.

40231889 is a deficient number, since it is larger than the sum of its proper divisors (1).

40231889 is an equidigital number, since it uses as much as digits as its factorization.

40231889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 40231889 is about 6342.8612628687. The cubic root of 40231889 is about 342.6547907073.

The spelling of 40231889 in words is "forty million, two hundred thirty-one thousand, eight hundred eighty-nine".