16001949 has 8 divisors (see below), whose sum is σ = 21790080. Its totient is φ = 10440896.

The previous prime is 16001903. The next prime is 16001959. The reversal of 16001949 is 94910061.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16001949 - 2⁸ = 16001693 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16001959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56604 + ... + 56885.

It is an arithmetic number, because the mean of its divisors is an integer number (2723760).

Almost surely, 2^16001949 is an apocalyptic number.

It is an amenable number.

16001949 is a deficient number, since it is larger than the sum of its proper divisors (5788131).

16001949 is a wasteful number, since it uses less digits than its factorization.

16001949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113539.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 16001949 is about 4000.2436175813. The cubic root of 16001949 is about 251.9944411724.

The spelling of 16001949 in words is "sixteen million, one thousand, nine hundred forty-nine".