39613285409 has 2 divisors, whose sum is σ = 39613285410. Its totient is φ = 39613285408.

The previous prime is 39613285339. The next prime is 39613285463. The reversal of 39613285409 is 90458231693.

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., 39610950625 + 2334784 = 199025^2 + 1528^2 .

It is a cyclic number.

It is not a de Polignac number, because 39613285409 - 2¹⁶ = 39613219873 is a prime.

It is not a weakly prime, because it can be changed into another prime (39613285109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19806642704 + 19806642705.

It is an arithmetic number, because the mean of its divisors is an integer number (19806642705).

Almost surely, 2^39613285409 is an apocalyptic number.

It is an amenable number.

39613285409 is a deficient number, since it is larger than the sum of its proper divisors (1).

39613285409 is an equidigital number, since it uses as much as digits as its factorization.

39613285409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The spelling of 39613285409 in words is "thirty-nine billion, six hundred thirteen million, two hundred eighty-five thousand, four hundred nine".