121673693 has 4 divisors (see below), whose sum is σ = 121783740. Its totient is φ = 121563648.

The previous prime is 121673687. The next prime is 121673731. The reversal of 121673693 is 396376121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 396376121 = 15413 ⋅25717.

It can be written as a sum of positive squares in 2 ways, for example, as 20811844 + 100861849 = 4562^2 + 10043^2 .

It is a cyclic number.

It is not a de Polignac number, because 121673693 - 2²⁰ = 120625117 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 (121673603) 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, 53348 + ... + 55581.

It is an arithmetic number, because the mean of its divisors is an integer number (30445935).

Almost surely, 2^121673693 is an apocalyptic number.

It is an amenable number.

121673693 is a deficient number, since it is larger than the sum of its proper divisors (110047).

121673693 is a wasteful number, since it uses less digits than its factorization.

121673693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110046.

The product of its digits is 40824, while the sum is 38.

The square root of 121673693 is about 11030.5799031601. The cubic root of 121673693 is about 495.5249920954.

The spelling of 121673693 in words is "one hundred twenty-one million, six hundred seventy-three thousand, six hundred ninety-three".