743911961 has 4 divisors (see below), whose sum is σ = 801135972. Its totient is φ = 686687952.

The previous prime is 743911871. The next prime is 743911963. The reversal of 743911961 is 169119347.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 121110025 + 622801936 = 11005^2 + 24956^2 .

It is a cyclic number.

It is not a de Polignac number, because 743911961 - 2²⁶ = 676803097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (743911963) 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, 28611986 + ... + 28612011.

It is an arithmetic number, because the mean of its divisors is an integer number (200283993).

Almost surely, 2^743911961 is an apocalyptic number.

It is an amenable number.

743911961 is a deficient number, since it is larger than the sum of its proper divisors (57224011).

743911961 is a wasteful number, since it uses less digits than its factorization.

743911961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57224010.

The product of its digits is 40824, while the sum is 41.

The square root of 743911961 is about 27274.7495130569. The cubic root of 743911961 is about 906.0952363797.

The spelling of 743911961 in words is "seven hundred forty-three million, nine hundred eleven thousand, nine hundred sixty-one".