121703665 has 8 divisors (see below), whose sum is σ = 146104488. Its totient is φ = 97322880.

The previous prime is 121703641. The next prime is 121703689. The reversal of 121703665 is 566307121.

It is an interprime number because it is at equal distance from previous prime (121703641) and next prime (121703689).

It can be written as a sum of positive squares in 4 ways, for example, as 197136 + 121506529 = 444^2 + 11023^2 .

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

It is not a de Polignac number, because 121703665 - 2⁷ = 121703537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17835 + ... + 23695.

It is an arithmetic number, because the mean of its divisors is an integer number (18263061).

Almost surely, 2^121703665 is an apocalyptic number.

It is an amenable number.

121703665 is a deficient number, since it is larger than the sum of its proper divisors (24400823).

121703665 is an equidigital number, since it uses as much as digits as its factorization.

121703665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10019.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 121703665 is about 11031.9384062820. The cubic root of 121703665 is about 495.5656764739.

The spelling of 121703665 in words is "one hundred twenty-one million, seven hundred three thousand, six hundred sixty-five".