121693447 has 4 divisors (see below), whose sum is σ = 122077656. Its totient is φ = 121309240.

The previous prime is 121693433. The next prime is 121693457. The reversal of 121693447 is 744396121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121693447 - 2¹⁹ = 121169159 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 (121693457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191629 + ... + 192262.

It is an arithmetic number, because the mean of its divisors is an integer number (30519414).

Almost surely, 2^121693447 is an apocalyptic number.

121693447 is a deficient number, since it is larger than the sum of its proper divisors (384209).

121693447 is an equidigital number, since it uses as much as digits as its factorization.

121693447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384208.

The product of its digits is 36288, while the sum is 37.

The square root of 121693447 is about 11031.4752866514. The cubic root of 121693447 is about 495.5518071797.

The spelling of 121693447 in words is "one hundred twenty-one million, six hundred ninety-three thousand, four hundred forty-seven".