16436549 has 2 divisors, whose sum is σ = 16436550. Its totient is φ = 16436548.

The previous prime is 16436521. The next prime is 16436551. The reversal of 16436549 is 94563461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12376324 + 4060225 = 3518^2 + 2015^2 .

It is a cyclic number.

It is not a de Polignac number, because 16436549 - 2²⁰ = 15387973 is a prime.

Together with 16436551, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16436509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8218274 + 8218275.

It is an arithmetic number, because the mean of its divisors is an integer number (8218275).

Almost surely, 2^16436549 is an apocalyptic number.

It is an amenable number.

16436549 is a deficient number, since it is larger than the sum of its proper divisors (1).

16436549 is an equidigital number, since it uses as much as digits as its factorization.

16436549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 38.

The square root of 16436549 is about 4054.2014010160. The cubic root of 16436549 is about 254.2554160852.

Subtracting from 16436549 its sum of digits (38), we obtain a triangular number (16436511 = T₅₇₃₃).

It can be divided in two parts, 1643 and 6549, that added together give a 13-th power (8192 = 2¹³).

The spelling of 16436549 in words is "sixteen million, four hundred thirty-six thousand, five hundred forty-nine".