149971147 has 2 divisors, whose sum is σ = 149971148. Its totient is φ = 149971146.

The previous prime is 149971139. The next prime is 149971169. The reversal of 149971147 is 741179941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 149971147 - 2³ = 149971139 is a prime.

It is not a weakly prime, because it can be changed into another prime (149971187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74985573 + 74985574.

It is an arithmetic number, because the mean of its divisors is an integer number (74985574).

Almost surely, 2^149971147 is an apocalyptic number.

149971147 is a deficient number, since it is larger than the sum of its proper divisors (1).

149971147 is an equidigital number, since it uses as much as digits as its factorization.

149971147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 43.

The square root of 149971147 is about 12246.2707384738. The cubic root of 149971147 is about 531.2952147537.

The spelling of 149971147 in words is "one hundred forty-nine million, nine hundred seventy-one thousand, one hundred forty-seven".