121404493 has 4 divisors (see below), whose sum is σ = 138748000. Its totient is φ = 104060988.

The previous prime is 121404467. The next prime is 121404499. The reversal of 121404493 is 394404121.

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 121404493 - 2⁵ = 121404461 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 (121404499) 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, 8671743 + ... + 8671756.

It is an arithmetic number, because the mean of its divisors is an integer number (34687000).

Almost surely, 2^121404493 is an apocalyptic number.

It is an amenable number.

121404493 is a deficient number, since it is larger than the sum of its proper divisors (17343507).

121404493 is an equidigital number, since it uses as much as digits as its factorization.

121404493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17343506.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 121404493 is about 11018.3707053266. The cubic root of 121404493 is about 495.1592767036.

The spelling of 121404493 in words is "one hundred twenty-one million, four hundred four thousand, four hundred ninety-three".