23653649 has 2 divisors, whose sum is σ = 23653650. Its totient is φ = 23653648.

The previous prime is 23653633. The next prime is 23653667. The reversal of 23653649 is 94635632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12730624 + 10923025 = 3568^2 + 3305^2 .

It is a cyclic number.

It is not a de Polignac number, because 23653649 - 2⁴ = 23653633 is a prime.

It is a super-2 number, since 2×23653649² = 1118990222030402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23653699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11826824 + 11826825.

It is an arithmetic number, because the mean of its divisors is an integer number (11826825).

Almost surely, 2^23653649 is an apocalyptic number.

It is an amenable number.

23653649 is a deficient number, since it is larger than the sum of its proper divisors (1).

23653649 is an equidigital number, since it uses as much as digits as its factorization.

23653649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 38.

The square root of 23653649 is about 4863.5017220106. The cubic root of 23653649 is about 287.0556169455.

The spelling of 23653649 in words is "twenty-three million, six hundred fifty-three thousand, six hundred forty-nine".