121684923 has 24 divisors (see below), whose sum is σ = 183758848. Its totient is φ = 80464104.

The previous prime is 121684903. The next prime is 121684943. The reversal of 121684923 is 329486121.

121684923 is a `hidden beast` number, since 1 + 2 + 168 + 492 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (121684903) and next prime (121684943).

It is not a de Polignac number, because 121684923 - 2⁶ = 121684859 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 (121684903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28890 + ... + 32832.

Almost surely, 2^121684923 is an apocalyptic number.

121684923 is a deficient number, since it is larger than the sum of its proper divisors (62073925).

121684923 is an equidigital number, since it uses as much as digits as its factorization.

121684923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4085 (or 4073 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 121684923 is about 11031.0889308354. The cubic root of 121684923 is about 495.5402366245.

The spelling of 121684923 in words is "one hundred twenty-one million, six hundred eighty-four thousand, nine hundred twenty-three".