16077509 has 4 divisors (see below), whose sum is σ = 18374304. Its totient is φ = 13780716.

The previous prime is 16077491. The next prime is 16077511. The reversal of 16077509 is 90577061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90577061 = 277 ⋅326993.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16077509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16077599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1148387 + ... + 1148400.

It is an arithmetic number, because the mean of its divisors is an integer number (4593576).

Almost surely, 2^16077509 is an apocalyptic number.

It is an amenable number.

16077509 is a deficient number, since it is larger than the sum of its proper divisors (2296795).

16077509 is an equidigital number, since it uses as much as digits as its factorization.

16077509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2296794.

The product of its (nonzero) digits is 13230, while the sum is 35.

The square root of 16077509 is about 4009.6769196533. The cubic root of 16077509 is about 252.3904514493.

The spelling of 16077509 in words is "sixteen million, seventy-seven thousand, five hundred nine".