39650973529 has 2 divisors, whose sum is σ = 39650973530. Its totient is φ = 39650973528.

The previous prime is 39650973443. The next prime is 39650973569. The reversal of 39650973529 is 92537905693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37939248400 + 1711725129 = 194780^2 + 41373^2 .

It is a cyclic number.

It is not a de Polignac number, because 39650973529 - 2⁹ = 39650973017 is a prime.

It is not a weakly prime, because it can be changed into another prime (39650973569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19825486764 + 19825486765.

It is an arithmetic number, because the mean of its divisors is an integer number (19825486765).

Almost surely, 2^39650973529 is an apocalyptic number.

It is an amenable number.

39650973529 is a deficient number, since it is larger than the sum of its proper divisors (1).

39650973529 is an equidigital number, since it uses as much as digits as its factorization.

39650973529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13778100, while the sum is 58.

The spelling of 39650973529 in words is "thirty-nine billion, six hundred fifty million, nine hundred seventy-three thousand, five hundred twenty-nine".