39545387797 has 2 divisors, whose sum is σ = 39545387798. Its totient is φ = 39545387796.

The previous prime is 39545387779. The next prime is 39545387821. The reversal of 39545387797 is 79778354593.

39545387797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (39545387779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33120724081 + 6424663716 = 181991^2 + 80154^2 .

It is a cyclic number.

It is not a de Polignac number, because 39545387797 - 2¹⁵ = 39545355029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39545387737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19772693898 + 19772693899.

It is an arithmetic number, because the mean of its divisors is an integer number (19772693899).

Almost surely, 2^39545387797 is an apocalyptic number.

It is an amenable number.

39545387797 is a deficient number, since it is larger than the sum of its proper divisors (1).

39545387797 is an equidigital number, since it uses as much as digits as its factorization.

39545387797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 200037600, while the sum is 67.

The spelling of 39545387797 in words is "thirty-nine billion, five hundred forty-five million, three hundred eighty-seven thousand, seven hundred ninety-seven".