40434189739 has 2 divisors, whose sum is σ = 40434189740. Its totient is φ = 40434189738.

The previous prime is 40434189703. The next prime is 40434189797. The reversal of 40434189739 is 93798143404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40434189739 - 2¹⁷ = 40434058667 is a prime.

It is not a weakly prime, because it can be changed into another prime (40434189139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20217094869 + 20217094870.

It is an arithmetic number, because the mean of its divisors is an integer number (20217094870).

Almost surely, 2^40434189739 is an apocalyptic number.

40434189739 is a deficient number, since it is larger than the sum of its proper divisors (1).

40434189739 is an equidigital number, since it uses as much as digits as its factorization.

40434189739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 40434189739 in words is "forty billion, four hundred thirty-four million, one hundred eighty-nine thousand, seven hundred thirty-nine".