16049491 has 4 divisors (see below), whose sum is σ = 16440984. Its totient is φ = 15658000.

The previous prime is 16049489. The next prime is 16049497. The reversal of 16049491 is 19494061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19494061 = 29 ⋅672209.

It is a cyclic number.

It is not a de Polignac number, because 16049491 - 2¹ = 16049489 is a prime.

It is a super-3 number, since 3×16049491³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16049497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195685 + ... + 195766.

It is an arithmetic number, because the mean of its divisors is an integer number (4110246).

Almost surely, 2^16049491 is an apocalyptic number.

16049491 is a deficient number, since it is larger than the sum of its proper divisors (391493).

16049491 is an equidigital number, since it uses as much as digits as its factorization.

16049491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391492.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 16049491 is about 4006.1815984800. The cubic root of 16049491 is about 252.2437540260.

The spelling of 16049491 in words is "sixteen million, forty-nine thousand, four hundred ninety-one".