16903493 has 2 divisors, whose sum is σ = 16903494. Its totient is φ = 16903492.

The previous prime is 16903489. The next prime is 16903501. The reversal of 16903493 is 39430961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10543009 + 6360484 = 3247^2 + 2522^2 .

It is a cyclic number.

It is not a de Polignac number, because 16903493 - 2² = 16903489 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16903693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8451746 + 8451747.

It is an arithmetic number, because the mean of its divisors is an integer number (8451747).

Almost surely, 2^16903493 is an apocalyptic number.

It is an amenable number.

16903493 is a deficient number, since it is larger than the sum of its proper divisors (1).

16903493 is an equidigital number, since it uses as much as digits as its factorization.

16903493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 16903493 is about 4111.3857761100. The cubic root of 16903493 is about 256.6406733295.

The spelling of 16903493 in words is "sixteen million, nine hundred three thousand, four hundred ninety-three".