121523617 has 2 divisors, whose sum is σ = 121523618. Its totient is φ = 121523616.

The previous prime is 121523603. The next prime is 121523629. The reversal of 121523617 is 716325121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76580001 + 44943616 = 8751^2 + 6704^2 .

It is a cyclic number.

It is not a de Polignac number, because 121523617 - 2⁷ = 121523489 is a prime.

It is not a weakly prime, because it can be changed into another prime (121523687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60761808 + 60761809.

It is an arithmetic number, because the mean of its divisors is an integer number (60761809).

Almost surely, 2^121523617 is an apocalyptic number.

It is an amenable number.

121523617 is a deficient number, since it is larger than the sum of its proper divisors (1).

121523617 is an equidigital number, since it uses as much as digits as its factorization.

121523617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 28.

The square root of 121523617 is about 11023.7750793456. The cubic root of 121523617 is about 495.3211764551.

Adding to 121523617 its reverse (716325121), we get a palindrome (837848738).

The spelling of 121523617 in words is "one hundred twenty-one million, five hundred twenty-three thousand, six hundred seventeen".