40430189 has 2 divisors, whose sum is σ = 40430190. Its totient is φ = 40430188.

The previous prime is 40430183. The next prime is 40430197. The reversal of 40430189 is 98103404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37724164 + 2706025 = 6142^2 + 1645^2 .

It is a cyclic number.

It is not a de Polignac number, because 40430189 - 2¹² = 40426093 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 (40430183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20215094 + 20215095.

It is an arithmetic number, because the mean of its divisors is an integer number (20215095).

Almost surely, 2^40430189 is an apocalyptic number.

It is an amenable number.

40430189 is a deficient number, since it is larger than the sum of its proper divisors (1).

40430189 is an equidigital number, since it uses as much as digits as its factorization.

40430189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 40430189 is about 6358.4737948662. The cubic root of 40430189 is about 343.2168416389.

The spelling of 40430189 in words is "forty million, four hundred thirty thousand, one hundred eighty-nine".