3135947909 has 2 divisors, whose sum is σ = 3135947910. Its totient is φ = 3135947908.

The previous prime is 3135947887. The next prime is 3135947911. The reversal of 3135947909 is 9097495313.

3135947909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2469791809 + 666156100 = 49697^2 + 25810^2 .

It is an emirp because it is prime and its reverse (9097495313) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3135947909 is a prime.

It is a super-2 number, since 2×3135947909² = 19668338575922944562, which contains 22 as substring.

Together with 3135947911, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3135967909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1567973954 + 1567973955.

It is an arithmetic number, because the mean of its divisors is an integer number (1567973955).

Almost surely, 2^3135947909 is an apocalyptic number.

It is an amenable number.

3135947909 is a deficient number, since it is larger than the sum of its proper divisors (1).

3135947909 is an equidigital number, since it uses as much as digits as its factorization.

3135947909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 918540, while the sum is 50.

The square root of 3135947909 is about 55999.5348998543. The cubic root of 3135947909 is about 1463.7141795045.

The spelling of 3135947909 in words is "three billion, one hundred thirty-five million, nine hundred forty-seven thousand, nine hundred nine".