7138513 has 2 divisors, whose sum is σ = 7138514. Its totient is φ = 7138512.

The previous prime is 7138489. The next prime is 7138541. The reversal of 7138513 is 3158317.

It is an a-pointer prime, because the next prime (7138541) can be obtained adding 7138513 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4422609 + 2715904 = 2103^2 + 1648^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7138513 is a prime.

It is not a weakly prime, because it can be changed into another prime (7138613) 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, 3569256 + 3569257.

It is an arithmetic number, because the mean of its divisors is an integer number (3569257).

Almost surely, 2^7138513 is an apocalyptic number.

It is an amenable number.

7138513 is a deficient number, since it is larger than the sum of its proper divisors (1).

7138513 is an equidigital number, since it uses as much as digits as its factorization.

7138513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 28.

The square root of 7138513 is about 2671.7995808069. The cubic root of 7138513 is about 192.5466283852.

The spelling of 7138513 in words is "seven million, one hundred thirty-eight thousand, five hundred thirteen".