121673859 has 4 divisors (see below), whose sum is σ = 162231816. Its totient is φ = 81115904.

The previous prime is 121673857. The next prime is 121673861. The reversal of 121673859 is 958376121.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (121673857) and next prime (121673861).

It is a cyclic number.

It is not a de Polignac number, because 121673859 - 2¹ = 121673857 is a prime.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 121673859.

It is not an unprimeable number, because it can be changed into a prime (121673857) 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, 20278974 + ... + 20278979.

It is an arithmetic number, because the mean of its divisors is an integer number (40557954).

Almost surely, 2^121673859 is an apocalyptic number.

121673859 is a deficient number, since it is larger than the sum of its proper divisors (40557957).

121673859 is an equidigital number, since it uses as much as digits as its factorization.

121673859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40557956.

The product of its digits is 90720, while the sum is 42.

The square root of 121673859 is about 11030.5874276940. The cubic root of 121673859 is about 495.5252174443.

The spelling of 121673859 in words is "one hundred twenty-one million, six hundred seventy-three thousand, eight hundred fifty-nine".