743979121 has 4 divisors (see below), whose sum is σ = 759808512. Its totient is φ = 728149732.

The previous prime is 743979113. The next prime is 743979127. The reversal of 743979121 is 121979347.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 743979121 - 2³ = 743979113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (743979127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7914625 + ... + 7914718.

It is an arithmetic number, because the mean of its divisors is an integer number (189952128).

Almost surely, 2^743979121 is an apocalyptic number.

It is an amenable number.

743979121 is a deficient number, since it is larger than the sum of its proper divisors (15829391).

743979121 is a wasteful number, since it uses less digits than its factorization.

743979121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15829390.

The product of its digits is 95256, while the sum is 43.

The square root of 743979121 is about 27275.9806606472. The cubic root of 743979121 is about 906.1225028342.

The spelling of 743979121 in words is "seven hundred forty-three million, nine hundred seventy-nine thousand, one hundred twenty-one".