121973903 has 4 divisors (see below), whose sum is σ = 122414520. Its totient is φ = 121533288.

The previous prime is 121973897. The next prime is 121973959. The reversal of 121973903 is 309379121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 309379121 = 2113 ⋅146417.

It is a cyclic number.

It is not a de Polignac number, because 121973903 - 2¹⁴ = 121957519 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 (121973983) 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, 219893 + ... + 220446.

It is an arithmetic number, because the mean of its divisors is an integer number (30603630).

Almost surely, 2^121973903 is an apocalyptic number.

121973903 is a deficient number, since it is larger than the sum of its proper divisors (440617).

121973903 is an equidigital number, since it uses as much as digits as its factorization.

121973903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440616.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 121973903 is about 11044.1795983224. The cubic root of 121973903 is about 495.9321997487.

The spelling of 121973903 in words is "one hundred twenty-one million, nine hundred seventy-three thousand, nine hundred three".