16731487 has 2 divisors, whose sum is σ = 16731488. Its totient is φ = 16731486.

The previous prime is 16731469. The next prime is 16731523. The reversal of 16731487 is 78413761.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16731487 - 2¹⁵ = 16698719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16732487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8365743 + 8365744.

It is an arithmetic number, because the mean of its divisors is an integer number (8365744).

Almost surely, 2^16731487 is an apocalyptic number.

16731487 is a deficient number, since it is larger than the sum of its proper divisors (1).

16731487 is an equidigital number, since it uses as much as digits as its factorization.

16731487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 37.

The square root of 16731487 is about 4090.4140377228. The cubic root of 16731487 is about 255.7671986375.

It can be divided in two parts, 1673 and 1487, that added together give a triangular number (3160 = T₇₉).

The spelling of 16731487 in words is "sixteen million, seven hundred thirty-one thousand, four hundred eighty-seven".