1947383967169 has 3 divisors (see below), whose sum is σ = 1947385362657. Its totient is φ = 1947382571682.

The previous prime is 1947383967161. The next prime is 1947383967211. The reversal of 1947383967169 is 9617693837491.

The square root of 1947383967169 is 1395487.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1947383967169 - 2³ = 1947383967161 is a prime.

It is a super-2 number, since 2×1947383967169² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1947383967161) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 697744 + ... + 2093230.

It is an arithmetic number, because the mean of its divisors is an integer number (649128454219).

Almost surely, 2^{1947383967169} is an apocalyptic number.

1947383967169 is the 1395487-th square number.

1947383967169 is the 697744-th centered octagonal number.

It is an amenable number.

1947383967169 is a deficient number, since it is larger than the sum of its proper divisors (1395488).

1947383967169 is an frugal number, since it uses more digits than its factorization.

1947383967169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2790974 (or 1395487 counting only the distinct ones).

The product of its digits is 370355328, while the sum is 73.

The spelling of 1947383967169 in words is "one trillion, nine hundred forty-seven billion, three hundred eighty-three million, nine hundred sixty-seven thousand, one hundred sixty-nine".