16723501 has 2 divisors, whose sum is σ = 16723502. Its totient is φ = 16723500.

The previous prime is 16723489. The next prime is 16723537. The reversal of 16723501 is 10532761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16597476 + 126025 = 4074^2 + 355^2 .

It is an emirp because it is prime and its reverse (10532761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16723501 - 2⁹ = 16722989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16723541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8361750 + 8361751.

It is an arithmetic number, because the mean of its divisors is an integer number (8361751).

Almost surely, 2^16723501 is an apocalyptic number.

It is an amenable number.

16723501 is a deficient number, since it is larger than the sum of its proper divisors (1).

16723501 is an equidigital number, since it uses as much as digits as its factorization.

16723501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 16723501 is about 4089.4377364132. The cubic root of 16723501 is about 255.7264992881.

The spelling of 16723501 in words is "sixteen million, seven hundred twenty-three thousand, five hundred one".