149847081 has 4 divisors (see below), whose sum is σ = 199796112. Its totient is φ = 99898052.

The previous prime is 149847073. The next prime is 149847083. The reversal of 149847081 is 180748941.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 149847081 - 2³ = 149847073 is a prime.

It is a super-2 number, since 2×149847081² = 44908295368441122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (149847083) 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, 24974511 + ... + 24974516.

It is an arithmetic number, because the mean of its divisors is an integer number (49949028).

Almost surely, 2^149847081 is an apocalyptic number.

It is an amenable number.

149847081 is a deficient number, since it is larger than the sum of its proper divisors (49949031).

149847081 is an equidigital number, since it uses as much as digits as its factorization.

149847081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49949030.

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 149847081 is about 12241.2042299767. The cubic root of 149847081 is about 531.1486668824.

The spelling of 149847081 in words is "one hundred forty-nine million, eight hundred forty-seven thousand, eighty-one".