139532962609 has 2 divisors, whose sum is σ = 139532962610. Its totient is φ = 139532962608.

The previous prime is 139532962567. The next prime is 139532962643. The reversal of 139532962609 is 906269235931.

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., 130774810384 + 8758152225 = 361628^2 + 93585^2 .

It is a cyclic number.

It is not a de Polignac number, because 139532962609 - 2⁹ = 139532962097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139532962609.

It is not a weakly prime, because it can be changed into another prime (139532962649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69766481304 + 69766481305.

It is an arithmetic number, because the mean of its divisors is an integer number (69766481305).

Almost surely, 2^139532962609 is an apocalyptic number.

It is an amenable number.

139532962609 is a deficient number, since it is larger than the sum of its proper divisors (1).

139532962609 is an equidigital number, since it uses as much as digits as its factorization.

139532962609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4723920, while the sum is 55.

The spelling of 139532962609 in words is "one hundred thirty-nine billion, five hundred thirty-two million, nine hundred sixty-two thousand, six hundred nine".