9146947813 has 4 divisors (see below), whose sum is σ = 9319531788. Its totient is φ = 8974363840.

The previous prime is 9146947787. The next prime is 9146947847. The reversal of 9146947813 is 3187496419.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3187496419 = 127 ⋅25098397.

It can be written as a sum of positive squares in 2 ways, for example, as 8367309729 + 779638084 = 91473^2 + 27922^2 .

It is a cyclic number.

It is not a de Polignac number, because 9146947813 - 2²⁹ = 8610076901 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 (9146942813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86291908 + ... + 86292013.

It is an arithmetic number, because the mean of its divisors is an integer number (2329882947).

Almost surely, 2^9146947813 is an apocalyptic number.

It is an amenable number.

9146947813 is a deficient number, since it is larger than the sum of its proper divisors (172583975).

9146947813 is a wasteful number, since it uses less digits than its factorization.

9146947813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172583974.

The product of its digits is 1306368, while the sum is 52.

The square root of 9146947813 is about 95639.6769808431. The cubic root of 9146947813 is about 2091.3436422301.

The spelling of 9146947813 in words is "nine billion, one hundred forty-six million, nine hundred forty-seven thousand, eight hundred thirteen".