16870549 has 2 divisors, whose sum is σ = 16870550. Its totient is φ = 16870548.

The previous prime is 16870543. The next prime is 16870559. The reversal of 16870549 is 94507861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13373649 + 3496900 = 3657^2 + 1870^2 .

It is a cyclic number.

It is not a de Polignac number, because 16870549 - 2⁵ = 16870517 is a prime.

It is a super-2 number, since 2×16870549² = 569230847122802, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16870543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8435274 + 8435275.

It is an arithmetic number, because the mean of its divisors is an integer number (8435275).

Almost surely, 2^16870549 is an apocalyptic number.

It is an amenable number.

16870549 is a deficient number, since it is larger than the sum of its proper divisors (1).

16870549 is an equidigital number, since it uses as much as digits as its factorization.

16870549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 16870549 is about 4107.3773870926. The cubic root of 16870549 is about 256.4738386024.

The spelling of 16870549 in words is "sixteen million, eight hundred seventy thousand, five hundred forty-nine".