121403689 has 4 divisors (see below), whose sum is σ = 132440400. Its totient is φ = 110366980.

The previous prime is 121403687. The next prime is 121403701. The reversal of 121403689 is 986304121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121403689 - 2¹ = 121403687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121403687) 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, 5518339 + ... + 5518360.

It is an arithmetic number, because the mean of its divisors is an integer number (33110100).

Almost surely, 2^121403689 is an apocalyptic number.

It is an amenable number.

121403689 is a deficient number, since it is larger than the sum of its proper divisors (11036711).

121403689 is a wasteful number, since it uses less digits than its factorization.

121403689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11036710.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 121403689 is about 11018.3342207432. The cubic root of 121403689 is about 495.1581836388.

The spelling of 121403689 in words is "one hundred twenty-one million, four hundred three thousand, six hundred eighty-nine".