121935613 has 8 divisors (see below), whose sum is σ = 123849216. Its totient is φ = 120027600.

The previous prime is 121935587. The next prime is 121935629. The reversal of 121935613 is 316539121.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121935613 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 (121935643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69495 + ... + 71227.

It is an arithmetic number, because the mean of its divisors is an integer number (15481152).

Almost surely, 2^121935613 is an apocalyptic number.

It is an amenable number.

121935613 is a deficient number, since it is larger than the sum of its proper divisors (1913603).

121935613 is an equidigital number, since it uses as much as digits as its factorization.

121935613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2795.

The product of its digits is 4860, while the sum is 31.

The square root of 121935613 is about 11042.4459699833. The cubic root of 121935613 is about 495.8803000368.

The spelling of 121935613 in words is "one hundred twenty-one million, nine hundred thirty-five thousand, six hundred thirteen".