149971447 has 2 divisors, whose sum is σ = 149971448. Its totient is φ = 149971446.

The previous prime is 149971439. The next prime is 149971457. The reversal of 149971447 is 744179941.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (744179941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149971447 - 2³ = 149971439 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 149971397 and 149971406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149971457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74985723 + 74985724.

It is an arithmetic number, because the mean of its divisors is an integer number (74985724).

Almost surely, 2^149971447 is an apocalyptic number.

149971447 is a deficient number, since it is larger than the sum of its proper divisors (1).

149971447 is an equidigital number, since it uses as much as digits as its factorization.

149971447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 46.

The square root of 149971447 is about 12246.2829870945. The cubic root of 149971447 is about 531.2955690185.

The spelling of 149971447 in words is "one hundred forty-nine million, nine hundred seventy-one thousand, four hundred forty-seven".