7137908909 has 4 divisors (see below), whose sum is σ = 7330825404. Its totient is φ = 6944992416.

The previous prime is 7137908893. The next prime is 7137908917. The reversal of 7137908909 is 9098097317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9098097317 = 68501 ⋅132817.

It can be written as a sum of positive squares in 2 ways, for example, as 2625025225 + 4512883684 = 51235^2 + 67178^2 .

It is a cyclic number.

It is not a de Polignac number, because 7137908909 - 2⁴ = 7137908893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7137908929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96458192 + ... + 96458265.

It is an arithmetic number, because the mean of its divisors is an integer number (1832706351).

Almost surely, 2^7137908909 is an apocalyptic number.

It is an amenable number.

7137908909 is a deficient number, since it is larger than the sum of its proper divisors (192916495).

7137908909 is a wasteful number, since it uses less digits than its factorization.

7137908909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192916494.

The product of its (nonzero) digits is 857304, while the sum is 53.

The square root of 7137908909 is about 84486.1462548742. The cubic root of 7137908909 is about 1925.4119686340.

The spelling of 7137908909 in words is "seven billion, one hundred thirty-seven million, nine hundred eight thousand, nine hundred nine".