39429618913 has 2 divisors, whose sum is σ = 39429618914. Its totient is φ = 39429618912.

The previous prime is 39429618853. The next prime is 39429618923. The reversal of 39429618913 is 31981692493.

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., 38837767329 + 591851584 = 197073^2 + 24328^2 .

It is a cyclic number.

It is not a de Polignac number, because 39429618913 - 2²¹ = 39427521761 is a prime.

It is not a weakly prime, because it can be changed into another prime (39429618923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19714809456 + 19714809457.

It is an arithmetic number, because the mean of its divisors is an integer number (19714809457).

Almost surely, 2^39429618913 is an apocalyptic number.

It is an amenable number.

39429618913 is a deficient number, since it is larger than the sum of its proper divisors (1).

39429618913 is an equidigital number, since it uses as much as digits as its factorization.

39429618913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2519424, while the sum is 55.

The spelling of 39429618913 in words is "thirty-nine billion, four hundred twenty-nine million, six hundred eighteen thousand, nine hundred thirteen".