16499901 has 16 divisors (see below), whose sum is σ = 25044480. Its totient is φ = 9564720.

The previous prime is 16499897. The next prime is 16499929. The reversal of 16499901 is 10999461.

It is not a de Polignac number, because 16499901 - 2² = 16499897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16499901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16499501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10111 + ... + 11628.

It is an arithmetic number, because the mean of its divisors is an integer number (1565280).

Almost surely, 2^16499901 is an apocalyptic number.

16499901 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16499901 is a deficient number, since it is larger than the sum of its proper divisors (8544579).

16499901 is a wasteful number, since it uses less digits than its factorization.

16499901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21776.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 16499901 is about 4062.0070162421. The cubic root of 16499901 is about 254.5816593176.

The spelling of 16499901 in words is "sixteen million, four hundred ninety-nine thousand, nine hundred one".