121623649 has 8 divisors (see below), whose sum is σ = 139612608. Its totient is φ = 103788240.

The previous prime is 121623647. The next prime is 121623659. The reversal of 121623649 is 946326121.

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 not a de Polignac number, because 121623649 - 2¹ = 121623647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121623647) 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, 36682 + ... + 39859.

It is an arithmetic number, because the mean of its divisors is an integer number (17451576).

Almost surely, 2^121623649 is an apocalyptic number.

It is an amenable number.

121623649 is a deficient number, since it is larger than the sum of its proper divisors (17988959).

121623649 is an equidigital number, since it uses as much as digits as its factorization.

121623649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76775.

The product of its digits is 15552, while the sum is 34.

The square root of 121623649 is about 11028.3112487815. The cubic root of 121623649 is about 495.4570468322.

The spelling of 121623649 in words is "one hundred twenty-one million, six hundred twenty-three thousand, six hundred forty-nine".