39975352409 has 2 divisors, whose sum is σ = 39975352410. Its totient is φ = 39975352408.

The previous prime is 39975352381. The next prime is 39975352427. The reversal of 39975352409 is 90425357993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34995933184 + 4979419225 = 187072^2 + 70565^2 .

It is a cyclic number.

It is not a de Polignac number, because 39975352409 - 2³² = 35680385113 is a prime.

It is not a weakly prime, because it can be changed into another prime (39975352909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19987676204 + 19987676205.

It is an arithmetic number, because the mean of its divisors is an integer number (19987676205).

Almost surely, 2^39975352409 is an apocalyptic number.

It is an amenable number.

39975352409 is a deficient number, since it is larger than the sum of its proper divisors (1).

39975352409 is an equidigital number, since it uses as much as digits as its factorization.

39975352409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9185400, while the sum is 56.

The spelling of 39975352409 in words is "thirty-nine billion, nine hundred seventy-five million, three hundred fifty-two thousand, four hundred nine".