743644121 has 8 divisors (see below), whose sum is σ = 814888704. Its totient is φ = 673006320.

The previous prime is 743644117. The next prime is 743644157. The reversal of 743644121 is 121446347.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 743644121 - 2² = 743644117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (743644621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149126 + ... + 154031.

It is an arithmetic number, because the mean of its divisors is an integer number (101861088).

Almost surely, 2^743644121 is an apocalyptic number.

It is an amenable number.

743644121 is a deficient number, since it is larger than the sum of its proper divisors (71244583).

743644121 is a wasteful number, since it uses less digits than its factorization.

743644121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303391.

The product of its digits is 16128, while the sum is 32.

The square root of 743644121 is about 27269.8390350952. The cubic root of 743644121 is about 905.9864790300.

The spelling of 743644121 in words is "seven hundred forty-three million, six hundred forty-four thousand, one hundred twenty-one".