16723957 has 2 divisors, whose sum is σ = 16723958. Its totient is φ = 16723956.

The previous prime is 16723913. The next prime is 16723997. The reversal of 16723957 is 75932761.

It is an a-pointer prime, because the next prime (16723997) can be obtained adding 16723957 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16695396 + 28561 = 4086^2 + 169^2 .

It is a cyclic number.

It is not a de Polignac number, because 16723957 - 2¹⁹ = 16199669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16723997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8361978 + 8361979.

It is an arithmetic number, because the mean of its divisors is an integer number (8361979).

Almost surely, 2^16723957 is an apocalyptic number.

It is an amenable number.

16723957 is a deficient number, since it is larger than the sum of its proper divisors (1).

16723957 is an equidigital number, since it uses as much as digits as its factorization.

16723957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79380, while the sum is 40.

The square root of 16723957 is about 4089.4934894190. The cubic root of 16723957 is about 255.7288235666.

The spelling of 16723957 in words is "sixteen million, seven hundred twenty-three thousand, nine hundred fifty-seven".