16197149 has 2 divisors, whose sum is σ = 16197150. Its totient is φ = 16197148.

The previous prime is 16197119. The next prime is 16197151. The reversal of 16197149 is 94179161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13579225 + 2617924 = 3685^2 + 1618^2 .

It is a cyclic number.

It is not a de Polignac number, because 16197149 - 2⁸ = 16196893 is a prime.

Together with 16197151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16197119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8098574 + 8098575.

It is an arithmetic number, because the mean of its divisors is an integer number (8098575).

Almost surely, 2^16197149 is an apocalyptic number.

It is an amenable number.

16197149 is a deficient number, since it is larger than the sum of its proper divisors (1).

16197149 is an equidigital number, since it uses as much as digits as its factorization.

16197149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 38.

The square root of 16197149 is about 4024.5681755935. The cubic root of 16197149 is about 253.0149553461.

The spelling of 16197149 in words is "sixteen million, one hundred ninety-seven thousand, one hundred forty-nine".