23721961 has 8 divisors (see below), whose sum is σ = 24012000. Its totient is φ = 23433888.

The previous prime is 23721959. The next prime is 23721979. The reversal of 23721961 is 16912732.

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 23721961 - 2¹ = 23721959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23721911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47290 + ... + 47788.

It is an arithmetic number, because the mean of its divisors is an integer number (3001500).

Almost surely, 2^23721961 is an apocalyptic number.

It is an amenable number.

23721961 is a deficient number, since it is larger than the sum of its proper divisors (290039).

23721961 is a wasteful number, since it uses less digits than its factorization.

23721961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983.

The product of its digits is 4536, while the sum is 31.

The square root of 23721961 is about 4870.5195821391. The cubic root of 23721961 is about 287.3316912797.

The spelling of 23721961 in words is "twenty-three million, seven hundred twenty-one thousand, nine hundred sixty-one".