121563493 has 8 divisors (see below), whose sum is σ = 125655296. Its totient is φ = 117482400.

The previous prime is 121563457. The next prime is 121563509. The reversal of 121563493 is 394365121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121563493 is a prime.

It is a super-2 number, since 2×121563493² = 29555365660722098, 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 (121563433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25153 + ... + 29593.

It is an arithmetic number, because the mean of its divisors is an integer number (15706912).

Almost surely, 2^121563493 is an apocalyptic number.

It is an amenable number.

121563493 is a deficient number, since it is larger than the sum of its proper divisors (4091803).

121563493 is an equidigital number, since it uses as much as digits as its factorization.

121563493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5355.

The product of its digits is 19440, while the sum is 34.

The square root of 121563493 is about 11025.5835673220. The cubic root of 121563493 is about 495.3753477285.

The spelling of 121563493 in words is "one hundred twenty-one million, five hundred sixty-three thousand, four hundred ninety-three".