121649293 has 4 divisors (see below), whose sum is σ = 121857120. Its totient is φ = 121441468.

The previous prime is 121649291. The next prime is 121649299. The reversal of 121649293 is 392946121.

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 121649293 - 2¹ = 121649291 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 (121649291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103033 + ... + 104206.

It is an arithmetic number, because the mean of its divisors is an integer number (30464280).

Almost surely, 2^121649293 is an apocalyptic number.

It is an amenable number.

121649293 is a deficient number, since it is larger than the sum of its proper divisors (207827).

121649293 is an equidigital number, since it uses as much as digits as its factorization.

121649293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207826.

The product of its digits is 23328, while the sum is 37.

The square root of 121649293 is about 11029.4738315116. The cubic root of 121649293 is about 495.4918662876.

The spelling of 121649293 in words is "one hundred twenty-one million, six hundred forty-nine thousand, two hundred ninety-three".