139361513 has 4 divisors (see below), whose sum is σ = 139385220. Its totient is φ = 139337808.

The previous prime is 139361507. The next prime is 139361527. The reversal of 139361513 is 315163931.

139361513 = 8347² + 8348².

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 315163931 = 1187 ⋅265513.

It can be written as a sum of positive squares in 2 ways, for example, as 69689104 + 69672409 = 8348^2 + 8347^2 .

It is a cyclic number.

It is not a de Polignac number, because 139361513 - 2¹⁰ = 139360489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 139361513.

It is not an unprimeable number, because it can be changed into a prime (139369513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4331 + ... + 17247.

It is an arithmetic number, because the mean of its divisors is an integer number (34846305).

Almost surely, 2^139361513 is an apocalyptic number.

139361513 is the 8348-th centered square number.

It is an amenable number.

139361513 is a deficient number, since it is larger than the sum of its proper divisors (23707).

139361513 is a wasteful number, since it uses less digits than its factorization.

139361513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23706.

The product of its digits is 7290, while the sum is 32.

The square root of 139361513 is about 11805.1477330866. The cubic root of 139361513 is about 518.4588404723.

The spelling of 139361513 in words is "one hundred thirty-nine million, three hundred sixty-one thousand, five hundred thirteen".