39919938043 has 2 divisors, whose sum is σ = 39919938044. Its totient is φ = 39919938042.

The previous prime is 39919938029. The next prime is 39919938083. The reversal of 39919938043 is 34083991993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39919938043 - 2²¹ = 39917840891 is a prime.

It is a super-3 number, since 3×39919938043³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (39919938083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19959969021 + 19959969022.

It is an arithmetic number, because the mean of its divisors is an integer number (19959969022).

Almost surely, 2^39919938043 is an apocalyptic number.

39919938043 is a deficient number, since it is larger than the sum of its proper divisors (1).

39919938043 is an equidigital number, since it uses as much as digits as its factorization.

39919938043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5668704, while the sum is 58.

The spelling of 39919938043 in words is "thirty-nine billion, nine hundred nineteen million, nine hundred thirty-eight thousand, forty-three".