16391147 has 2 divisors, whose sum is σ = 16391148. Its totient is φ = 16391146.

The previous prime is 16391143. The next prime is 16391153. The reversal of 16391147 is 74119361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16391147 - 2² = 16391143 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16391143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8195573 + 8195574.

It is an arithmetic number, because the mean of its divisors is an integer number (8195574).

Almost surely, 2^16391147 is an apocalyptic number.

16391147 is a deficient number, since it is larger than the sum of its proper divisors (1).

16391147 is an equidigital number, since it uses as much as digits as its factorization.

16391147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 32.

The square root of 16391147 is about 4048.5981524473. The cubic root of 16391147 is about 254.0210937904.

The spelling of 16391147 in words is "sixteen million, three hundred ninety-one thousand, one hundred forty-seven".