149128947 has 24 divisors (see below), whose sum is σ = 248816880. Its totient is φ = 85063680.

The previous prime is 149128943. The next prime is 149128949. The reversal of 149128947 is 749821941.

It is a happy number.

It is not a de Polignac number, because 149128947 - 2² = 149128943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149128943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42622 + ... + 45987.

It is an arithmetic number, because the mean of its divisors is an integer number (10367370).

Almost surely, 2^149128947 is an apocalyptic number.

149128947 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

149128947 is a deficient number, since it is larger than the sum of its proper divisors (99687933).

149128947 is a wasteful number, since it uses less digits than its factorization.

149128947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88643 (or 88640 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 149128947 is about 12211.8363483958. The cubic root of 149128947 is about 530.2988074152.

The spelling of 149128947 in words is "one hundred forty-nine million, one hundred twenty-eight thousand, nine hundred forty-seven".