16696987 has 2 divisors, whose sum is σ = 16696988. Its totient is φ = 16696986.

The previous prime is 16696973. The next prime is 16696997. The reversal of 16696987 is 78969661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16696987 - 2¹⁹ = 16172699 is a prime.

It is not a weakly prime, because it can be changed into another prime (16696997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8348493 + 8348494.

It is an arithmetic number, because the mean of its divisors is an integer number (8348494).

Almost surely, 2^16696987 is an apocalyptic number.

16696987 is a deficient number, since it is larger than the sum of its proper divisors (1).

16696987 is an equidigital number, since it uses as much as digits as its factorization.

16696987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 52.

The square root of 16696987 is about 4086.1946845445. The cubic root of 16696987 is about 255.5912820108.

The spelling of 16696987 in words is "sixteen million, six hundred ninety-six thousand, nine hundred eighty-seven".