23701609 has 2 divisors, whose sum is σ = 23701610. Its totient is φ = 23701608.

The previous prime is 23701603. The next prime is 23701619. The reversal of 23701609 is 90610732.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19713600 + 3988009 = 4440^2 + 1997^2 .

It is a cyclic number.

It is not a de Polignac number, because 23701609 - 2⁷ = 23701481 is a prime.

It is equal to p_1489600 and since 23701609 and 1489600 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (23701603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11850804 + 11850805.

It is an arithmetic number, because the mean of its divisors is an integer number (11850805).

Almost surely, 2^23701609 is an apocalyptic number.

It is an amenable number.

23701609 is a deficient number, since it is larger than the sum of its proper divisors (1).

23701609 is an equidigital number, since it uses as much as digits as its factorization.

23701609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 23701609 is about 4868.4298290106. The cubic root of 23701609 is about 287.2494967298.

It can be divided in two parts, 23701 and 609, that added together give a triangular number (24310 = T₂₂₀).

The spelling of 23701609 in words is "twenty-three million, seven hundred one thousand, six hundred nine".