3091139509 has 2 divisors, whose sum is σ = 3091139510. Its totient is φ = 3091139508.

The previous prime is 3091139497. The next prime is 3091139543. The reversal of 3091139509 is 9059311903.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3079917009 + 11222500 = 55497^2 + 3350^2 .

It is an emirp because it is prime and its reverse (9059311903) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3091139509 - 2⁵ = 3091139477 is a prime.

It is a super-2 number, since 2×3091139509² = 19110286928201522162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3091139599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1545569754 + 1545569755.

It is an arithmetic number, because the mean of its divisors is an integer number (1545569755).

Almost surely, 2^3091139509 is an apocalyptic number.

It is an amenable number.

3091139509 is a deficient number, since it is larger than the sum of its proper divisors (1).

3091139509 is an equidigital number, since it uses as much as digits as its factorization.

3091139509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32805, while the sum is 40.

The square root of 3091139509 is about 55598.0171319086. The cubic root of 3091139509 is about 1456.7092188282.

The spelling of 3091139509 in words is "three billion, ninety-one million, one hundred thirty-nine thousand, five hundred nine".