16071901 has 2 divisors, whose sum is σ = 16071902. Its totient is φ = 16071900.

The previous prime is 16071889. The next prime is 16071911. The reversal of 16071901 is 10917061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8259876 + 7812025 = 2874^2 + 2795^2 .

It is an emirp because it is prime and its reverse (10917061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16071901 - 2⁹ = 16071389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16071911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8035950 + 8035951.

It is an arithmetic number, because the mean of its divisors is an integer number (8035951).

Almost surely, 2^16071901 is an apocalyptic number.

16071901 is the 2536-th centered pentagonal number.

It is an amenable number.

16071901 is a deficient number, since it is larger than the sum of its proper divisors (1).

16071901 is an equidigital number, since it uses as much as digits as its factorization.

16071901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 25.

The square root of 16071901 is about 4008.9775504485. The cubic root of 16071901 is about 252.3611025775.

Adding to 16071901 its reverse (10917061), we get a palindrome (26988962).

The spelling of 16071901 in words is "sixteen million, seventy-one thousand, nine hundred one".