16512493 has 2 divisors, whose sum is σ = 16512494. Its totient is φ = 16512492.

The previous prime is 16512479. The next prime is 16512497. The reversal of 16512493 is 39421561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9474084 + 7038409 = 3078^2 + 2653^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16512493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16512497) 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, 8256246 + 8256247.

It is an arithmetic number, because the mean of its divisors is an integer number (8256247).

Almost surely, 2^16512493 is an apocalyptic number.

It is an amenable number.

16512493 is a deficient number, since it is larger than the sum of its proper divisors (1).

16512493 is an equidigital number, since it uses as much as digits as its factorization.

16512493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 31.

The square root of 16512493 is about 4063.5566933414. The cubic root of 16512493 is about 254.6464046984.

The spelling of 16512493 in words is "sixteen million, five hundred twelve thousand, four hundred ninety-three".