16749457 has 2 divisors, whose sum is σ = 16749458. Its totient is φ = 16749456.

The previous prime is 16749433. The next prime is 16749463. The reversal of 16749457 is 75494761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13845841 + 2903616 = 3721^2 + 1704^2 .

It is a cyclic number.

It is not a de Polignac number, because 16749457 - 2¹⁹ = 16225169 is a prime.

It is not a weakly prime, because it can be changed into another prime (16749427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8374728 + 8374729.

It is an arithmetic number, because the mean of its divisors is an integer number (8374729).

Almost surely, 2^16749457 is an apocalyptic number.

It is an amenable number.

16749457 is a deficient number, since it is larger than the sum of its proper divisors (1).

16749457 is an equidigital number, since it uses as much as digits as its factorization.

16749457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 43.

The square root of 16749457 is about 4092.6100473903. The cubic root of 16749457 is about 255.8587324840.

The spelling of 16749457 in words is "sixteen million, seven hundred forty-nine thousand, four hundred fifty-seven".