139605413 has 2 divisors, whose sum is σ = 139605414. Its totient is φ = 139605412.

The previous prime is 139605373. The next prime is 139605437. The reversal of 139605413 is 314506931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112741924 + 26863489 = 10618^2 + 5183^2 .

It is a cyclic number.

It is not a de Polignac number, because 139605413 - 2¹² = 139601317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139605413.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139605443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69802706 + 69802707.

It is an arithmetic number, because the mean of its divisors is an integer number (69802707).

Almost surely, 2^139605413 is an apocalyptic number.

It is an amenable number.

139605413 is a deficient number, since it is larger than the sum of its proper divisors (1).

139605413 is an equidigital number, since it uses as much as digits as its factorization.

139605413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 139605413 is about 11815.4734564468. The cubic root of 139605413 is about 518.7611200403.

The spelling of 139605413 in words is "one hundred thirty-nine million, six hundred five thousand, four hundred thirteen".