743968161 has 24 divisors (see below), whose sum is σ = 1197724320. Its totient is φ = 442233216.

The previous prime is 743968153. The next prime is 743968223. The reversal of 743968161 is 161869347.

It is a happy number.

It is not a de Polignac number, because 743968161 - 2³ = 743968153 is a prime.

It is a super-3 number, since 3×743968161³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (743968151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125055 + ... + 130868.

It is an arithmetic number, because the mean of its divisors is an integer number (49905180).

Almost surely, 2^743968161 is an apocalyptic number.

It is an amenable number.

743968161 is a deficient number, since it is larger than the sum of its proper divisors (453756159).

743968161 is a wasteful number, since it uses less digits than its factorization.

743968161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255965 (or 255962 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 743968161 is about 27275.7797505406. The cubic root of 743968161 is about 906.1180532688.

The spelling of 743968161 in words is "seven hundred forty-three million, nine hundred sixty-eight thousand, one hundred sixty-one".