121973603 has 4 divisors (see below), whose sum is σ = 122026968. Its totient is φ = 121920240.

The previous prime is 121973581. The next prime is 121973609. The reversal of 121973603 is 306379121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 121973603 - 2⁶ = 121973539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121973603.

It is not an unprimeable number, because it can be changed into a prime (121973609) 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, 23093 + ... + 27878.

It is an arithmetic number, because the mean of its divisors is an integer number (30506742).

Almost surely, 2^121973603 is an apocalyptic number.

121973603 is a deficient number, since it is larger than the sum of its proper divisors (53365).

121973603 is an equidigital number, since it uses as much as digits as its factorization.

121973603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53364.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 121973603 is about 11044.1660164994. The cubic root of 121973603 is about 495.9317931596.

The spelling of 121973603 in words is "one hundred twenty-one million, nine hundred seventy-three thousand, six hundred three".