121637349 has 16 divisors (see below), whose sum is σ = 180570240. Its totient is φ = 80926560.

The previous prime is 121637323. The next prime is 121637359. The reversal of 121637349 is 943736121.

121637349 is a `hidden beast` number, since 12 + 1 + 637 + 3 + 4 + 9 = 666.

It is not a de Polignac number, because 121637349 - 2¹⁷ = 121506277 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121637359) 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 15 ways as a sum of consecutive naturals, for example, 9744 + ... + 18390.

It is an arithmetic number, because the mean of its divisors is an integer number (11285640).

Almost surely, 2^121637349 is an apocalyptic number.

It is an amenable number.

121637349 is a deficient number, since it is larger than the sum of its proper divisors (58932891).

121637349 is an equidigital number, since it uses as much as digits as its factorization.

121637349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9177 (or 9171 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 121637349 is about 11028.9323599340. The cubic root of 121637349 is about 495.4756493182.

It can be divided in two parts, 12 and 1637349, that added together give a palindrome (1637361).

The spelling of 121637349 in words is "one hundred twenty-one million, six hundred thirty-seven thousand, three hundred forty-nine".