23729401 has 4 divisors (see below), whose sum is σ = 23974132. Its totient is φ = 23484672.

The previous prime is 23729369. The next prime is 23729411. The reversal of 23729401 is 10492732.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5067001 + 18662400 = 2251^2 + 4320^2 .

It is a cyclic number.

It is not a de Polignac number, because 23729401 - 2⁵ = 23729369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23729401.

It is not an unprimeable number, because it can be changed into a prime (23729411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122220 + ... + 122413.

It is an arithmetic number, because the mean of its divisors is an integer number (5993533).

Almost surely, 2^23729401 is an apocalyptic number.

It is an amenable number.

23729401 is a deficient number, since it is larger than the sum of its proper divisors (244731).

23729401 is an equidigital number, since it uses as much as digits as its factorization.

23729401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244730.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 23729401 is about 4871.2833011435. The cubic root of 23729401 is about 287.3617270812.

The spelling of 23729401 in words is "twenty-three million, seven hundred twenty-nine thousand, four hundred one".