747372121 has 4 divisors (see below), whose sum is σ = 764752912. Its totient is φ = 729991332.

The previous prime is 747372053. The next prime is 747372151. The reversal of 747372121 is 121273747.

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 747372121 - 2⁹ = 747371609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (747372151) 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, 8690331 + ... + 8690416.

It is an arithmetic number, because the mean of its divisors is an integer number (191188228).

Almost surely, 2^747372121 is an apocalyptic number.

It is an amenable number.

747372121 is a deficient number, since it is larger than the sum of its proper divisors (17380791).

747372121 is a wasteful number, since it uses less digits than its factorization.

747372121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17380790.

The product of its digits is 16464, while the sum is 34.

The square root of 747372121 is about 27338.1074875347. The cubic root of 747372121 is about 907.4979050664.

The spelling of 747372121 in words is "seven hundred forty-seven million, three hundred seventy-two thousand, one hundred twenty-one".