149447671 has 4 divisors (see below), whose sum is σ = 149478912. Its totient is φ = 149416432.

The previous prime is 149447653. The next prime is 149447681. The reversal of 149447671 is 176744941.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 149447671 - 2⁹ = 149447159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149447681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6775 + ... + 18568.

It is an arithmetic number, because the mean of its divisors is an integer number (37369728).

Almost surely, 2^149447671 is an apocalyptic number.

149447671 is a deficient number, since it is larger than the sum of its proper divisors (31241).

149447671 is an equidigital number, since it uses as much as digits as its factorization.

149447671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31240.

The product of its digits is 169344, while the sum is 43.

The square root of 149447671 is about 12224.8791814071. The cubic root of 149447671 is about 530.6763301163.

The spelling of 149447671 in words is "one hundred forty-nine million, four hundred forty-seven thousand, six hundred seventy-one".