138960413 has 2 divisors, whose sum is σ = 138960414. Its totient is φ = 138960412.

The previous prime is 138960337. The next prime is 138960449. The reversal of 138960413 is 314069831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111471364 + 27489049 = 10558^2 + 5243^2 .

It is an emirp because it is prime and its reverse (314069831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138960413 - 2¹⁰ = 138959389 is a prime.

It is a super-2 number, since 2×138960413² = 38619992762261138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138960463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69480206 + 69480207.

It is an arithmetic number, because the mean of its divisors is an integer number (69480207).

Almost surely, 2^138960413 is an apocalyptic number.

It is an amenable number.

138960413 is a deficient number, since it is larger than the sum of its proper divisors (1).

138960413 is an equidigital number, since it uses as much as digits as its factorization.

138960413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 138960413 is about 11788.1471402422. The cubic root of 138960413 is about 517.9609658874.

The spelling of 138960413 in words is "one hundred thirty-eight million, nine hundred sixty thousand, four hundred thirteen".