121969935 has 48 divisors (see below), whose sum is σ = 222088800. Its totient is φ = 63510912.

The previous prime is 121969901. The next prime is 121969963. The reversal of 121969935 is 539969121.

It is a happy number.

It is a Cunningham number, because it is equal to 11044²-1.

It is not a de Polignac number, because 121969935 - 2¹² = 121965839 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 298011 + ... + 298419.

It is an arithmetic number, because the mean of its divisors is an integer number (4626850).

Almost surely, 2^121969935 is an apocalyptic number.

121969935 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121969935 is a deficient number, since it is larger than the sum of its proper divisors (100118865).

121969935 is an equidigital number, since it uses as much as digits as its factorization.

121969935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517 (or 464 counting only the distinct ones).

The product of its digits is 131220, while the sum is 45.

The square root of 121969935 is about 11043.9999547265. Note that the first 4 decimals coincide. The cubic root of 121969935 is about 495.9268218762.

The spelling of 121969935 in words is "one hundred twenty-one million, nine hundred sixty-nine thousand, nine hundred thirty-five".