121723613 has 16 divisors (see below), whose sum is σ = 139536000. Its totient is φ = 105103680.

The previous prime is 121723603. The next prime is 121723619. The reversal of 121723613 is 316327121.

It is not a de Polignac number, because 121723613 - 2¹² = 121719517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121723619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36083 + ... + 39311.

It is an arithmetic number, because the mean of its divisors is an integer number (8721000).

Almost surely, 2^121723613 is an apocalyptic number.

It is an amenable number.

121723613 is a deficient number, since it is larger than the sum of its proper divisors (17812387).

121723613 is a wasteful number, since it uses less digits than its factorization.

121723613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3412.

The product of its digits is 1512, while the sum is 26.

The square root of 121723613 is about 11032.8424714577. The cubic root of 121723613 is about 495.5927504437.

The spelling of 121723613 in words is "one hundred twenty-one million, seven hundred twenty-three thousand, six hundred thirteen".