122447993 has 8 divisors (see below), whose sum is σ = 123638400. Its totient is φ = 121263568.

The previous prime is 122447981. The next prime is 122448013. The reversal of 122447993 is 399744221.

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 122447993 - 2¹⁴ = 122431609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122447993.

It is not an unprimeable number, because it can be changed into a prime (122447933) 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, 46880 + ... + 49422.

It is an arithmetic number, because the mean of its divisors is an integer number (15454800).

Almost surely, 2^122447993 is an apocalyptic number.

It is an amenable number.

122447993 is a deficient number, since it is larger than the sum of its proper divisors (1190407).

122447993 is a wasteful number, since it uses less digits than its factorization.

122447993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2991.

The product of its digits is 108864, while the sum is 41.

The square root of 122447993 is about 11065.6221243995. The cubic root of 122447993 is about 496.5739013171.

The spelling of 122447993 in words is "one hundred twenty-two million, four hundred forty-seven thousand, nine hundred ninety-three".