16159901 has 2 divisors, whose sum is σ = 16159902. Its totient is φ = 16159900.

The previous prime is 16159883. The next prime is 16159921. The reversal of 16159901 is 10995161.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13912900 + 2247001 = 3730^2 + 1499^2 .

It is a cyclic number.

It is not a de Polignac number, because 16159901 - 2⁶ = 16159837 is a prime.

It is a super-2 number, since 2×16159901² = 522284800659602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16159921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8079950 + 8079951.

It is an arithmetic number, because the mean of its divisors is an integer number (8079951).

Almost surely, 2^16159901 is an apocalyptic number.

It is an amenable number.

16159901 is a deficient number, since it is larger than the sum of its proper divisors (1).

16159901 is an equidigital number, since it uses as much as digits as its factorization.

16159901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 32.

The square root of 16159901 is about 4019.9379348443. The cubic root of 16159901 is about 252.8208566903.

The spelling of 16159901 in words is "sixteen million, one hundred fifty-nine thousand, nine hundred one".