16393901 has 4 divisors (see below), whose sum is σ = 16407804. Its totient is φ = 16380000.

The previous prime is 16393877. The next prime is 16393913. The reversal of 16393901 is 10939361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1755625 + 14638276 = 1325^2 + 3826^2 .

It is a cyclic number.

It is not a de Polignac number, because 16393901 - 2⁶ = 16393837 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 (16393001) 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, 5000 + ... + 7601.

It is an arithmetic number, because the mean of its divisors is an integer number (4101951).

Almost surely, 2^16393901 is an apocalyptic number.

It is an amenable number.

16393901 is a deficient number, since it is larger than the sum of its proper divisors (13903).

16393901 is a wasteful number, since it uses less digits than its factorization.

16393901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13902.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 16393901 is about 4048.9382558888. The cubic root of 16393901 is about 254.0353196591.

The spelling of 16393901 in words is "sixteen million, three hundred ninety-three thousand, nine hundred one".