47145149 has 2 divisors, whose sum is σ = 47145150. Its totient is φ = 47145148.

The previous prime is 47145127. The next prime is 47145151. The reversal of 47145149 is 94154174.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39062500 + 8082649 = 6250^2 + 2843^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47145149 is a prime.

Together with 47145151, 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 (47145179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23572574 + 23572575.

It is an arithmetic number, because the mean of its divisors is an integer number (23572575).

Almost surely, 2^47145149 is an apocalyptic number.

It is an amenable number.

47145149 is a deficient number, since it is larger than the sum of its proper divisors (1).

47145149 is an equidigital number, since it uses as much as digits as its factorization.

47145149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 35.

The square root of 47145149 is about 6866.2325186379. The cubic root of 47145149 is about 361.2537280060.

The spelling of 47145149 in words is "forty-seven million, one hundred forty-five thousand, one hundred forty-nine".