121603969 has 2 divisors, whose sum is σ = 121603970. Its totient is φ = 121603968.

The previous prime is 121603961. The next prime is 121603973. The reversal of 121603969 is 969306121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103225600 + 18378369 = 10160^2 + 4287^2 .

It is a cyclic number.

It is not a de Polignac number, because 121603969 - 2³ = 121603961 is a prime.

It is a super-2 number, since 2×121603969² = 29575050553105922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121603961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60801984 + 60801985.

It is an arithmetic number, because the mean of its divisors is an integer number (60801985).

Almost surely, 2^121603969 is an apocalyptic number.

It is an amenable number.

121603969 is a deficient number, since it is larger than the sum of its proper divisors (1).

121603969 is an equidigital number, since it uses as much as digits as its factorization.

121603969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 121603969 is about 11027.4189636560. The cubic root of 121603969 is about 495.4303219841.

It can be divided in two parts, 12160 and 3969, that added together give a square (16129 = 127²).

The spelling of 121603969 in words is "one hundred twenty-one million, six hundred three thousand, nine hundred sixty-nine".