672838121 has 8 divisors (see below), whose sum is σ = 714441384. Its totient is φ = 631459840.

The previous prime is 672838109. The next prime is 672838141. The reversal of 672838121 is 121838276.

It can be written as a sum of positive squares in 4 ways, for example, as 27678121 + 645160000 = 5261^2 + 25400^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-672838121 is a prime.

It is a super-2 number, since 2×672838121² = 905422274141621282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (672838141) 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, 50060 + ... + 62061.

It is an arithmetic number, because the mean of its divisors is an integer number (89305173).

Almost surely, 2^672838121 is an apocalyptic number.

It is an amenable number.

672838121 is a deficient number, since it is larger than the sum of its proper divisors (41603263).

672838121 is a wasteful number, since it uses less digits than its factorization.

672838121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112491.

The product of its digits is 32256, while the sum is 38.

The square root of 672838121 is about 25939.1233660662. The cubic root of 672838121 is about 876.2678202430.

The spelling of 672838121 in words is "six hundred seventy-two million, eight hundred thirty-eight thousand, one hundred twenty-one".