121673447 has 4 divisors (see below), whose sum is σ = 139055376. Its totient is φ = 104291520.

The previous prime is 121673443. The next prime is 121673477. The reversal of 121673447 is 744376121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 744376121 = 83 ⋅8968387.

It is a cyclic number.

It is not a de Polignac number, because 121673447 - 2² = 121673443 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121673441) 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, 8690954 + ... + 8690967.

It is an arithmetic number, because the mean of its divisors is an integer number (34763844).

Almost surely, 2^121673447 is an apocalyptic number.

121673447 is a deficient number, since it is larger than the sum of its proper divisors (17381929).

121673447 is an equidigital number, since it uses as much as digits as its factorization.

121673447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17381928.

The product of its digits is 28224, while the sum is 35.

The square root of 121673447 is about 11030.5687523355. The cubic root of 121673447 is about 495.5246581442.

The spelling of 121673447 in words is "one hundred twenty-one million, six hundred seventy-three thousand, four hundred forty-seven".