121904453 has 4 divisors (see below), whose sum is σ = 132986688. Its totient is φ = 110822220.

The previous prime is 121904407. The next prime is 121904473. The reversal of 121904453 is 354409121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121904453 - 2⁶ = 121904389 is a prime.

It is a super-2 number, since 2×121904453² = 29721391322458418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121904473) 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, 5541101 + ... + 5541122.

It is an arithmetic number, because the mean of its divisors is an integer number (33246672).

Almost surely, 2^121904453 is an apocalyptic number.

It is an amenable number.

121904453 is a deficient number, since it is larger than the sum of its proper divisors (11082235).

121904453 is a wasteful number, since it uses less digits than its factorization.

121904453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11082234.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 121904453 is about 11041.0349605460. The cubic root of 121904453 is about 495.8380565769.

The spelling of 121904453 in words is "one hundred twenty-one million, nine hundred four thousand, four hundred fifty-three".