1947135413 has 2 divisors, whose sum is σ = 1947135414. Its totient is φ = 1947135412.

The previous prime is 1947135401. The next prime is 1947135419. The reversal of 1947135413 is 3145317491.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1860887044 + 86248369 = 43138^2 + 9287^2 .

It is a cyclic number.

It is not a de Polignac number, because 1947135413 - 2⁶ = 1947135349 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1947135419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 973567706 + 973567707.

It is an arithmetic number, because the mean of its divisors is an integer number (973567707).

Almost surely, 2^1947135413 is an apocalyptic number.

It is an amenable number.

1947135413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1947135413 is an equidigital number, since it uses as much as digits as its factorization.

1947135413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 38.

The square root of 1947135413 is about 44126.3573502278. The cubic root of 1947135413 is about 1248.7209130357.

The spelling of 1947135413 in words is "one billion, nine hundred forty-seven million, one hundred thirty-five thousand, four hundred thirteen".