121764399 has 8 divisors (see below), whose sum is σ = 162408960. Its totient is φ = 81148056.

The previous prime is 121764397. The next prime is 121764413. The reversal of 121764399 is 993467121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121764399 - 2¹ = 121764397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121764399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121764397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7042 + ... + 17120.

It is an arithmetic number, because the mean of its divisors is an integer number (20301120).

Almost surely, 2^121764399 is an apocalyptic number.

121764399 is a deficient number, since it is larger than the sum of its proper divisors (40644561).

121764399 is a wasteful number, since it uses less digits than its factorization.

121764399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14109.

The product of its digits is 81648, while the sum is 42.

The square root of 121764399 is about 11034.6907070384. The cubic root of 121764399 is about 495.6480971104.

The spelling of 121764399 in words is "one hundred twenty-one million, seven hundred sixty-four thousand, three hundred ninety-nine".