121903607 has 4 divisors (see below), whose sum is σ = 139318416. Its totient is φ = 104488800.

The previous prime is 121903597. The next prime is 121903627. The reversal of 121903607 is 706309121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 706309121 = 7 ⋅100901303.

It is a cyclic number.

It is not a de Polignac number, because 121903607 - 2⁶ = 121903543 is a prime.

It is a super-3 number, since 3×121903607³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 121903607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121903627) 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, 8707394 + ... + 8707407.

It is an arithmetic number, because the mean of its divisors is an integer number (34829604).

Almost surely, 2^121903607 is an apocalyptic number.

121903607 is a deficient number, since it is larger than the sum of its proper divisors (17414809).

121903607 is an equidigital number, since it uses as much as digits as its factorization.

121903607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17414808.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 121903607 is about 11040.9966488538. The cubic root of 121903607 is about 495.8369095584.

The spelling of 121903607 in words is "one hundred twenty-one million, nine hundred three thousand, six hundred seven".