16990577 has 2 divisors, whose sum is σ = 16990578. Its totient is φ = 16990576.

The previous prime is 16990559. The next prime is 16990591. The reversal of 16990577 is 77509961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8976016 + 8014561 = 2996^2 + 2831^2 .

It is a cyclic number.

It is not a de Polignac number, because 16990577 - 2¹⁸ = 16728433 is a prime.

It is not a weakly prime, because it can be changed into another prime (16990507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8495288 + 8495289.

It is an arithmetic number, because the mean of its divisors is an integer number (8495289).

Almost surely, 2^16990577 is an apocalyptic number.

It is an amenable number.

16990577 is a deficient number, since it is larger than the sum of its proper divisors (1).

16990577 is an equidigital number, since it uses as much as digits as its factorization.

16990577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 119070, while the sum is 44.

The square root of 16990577 is about 4121.9627606275. The cubic root of 16990577 is about 257.0806420766.

The spelling of 16990577 in words is "sixteen million, nine hundred ninety thousand, five hundred seventy-seven".