149649081 has 16 divisors (see below), whose sum is σ = 204342528. Its totient is φ = 97372800.

The previous prime is 149649067. The next prime is 149649089. The reversal of 149649081 is 180946941.

It is not a de Polignac number, because 149649081 - 2¹¹ = 149647033 is a prime.

It is a super-2 number, since 2×149649081² = 44789694888289122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (149649089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58101 + ... + 60621.

It is an arithmetic number, because the mean of its divisors is an integer number (12771408).

Almost surely, 2^149649081 is an apocalyptic number.

It is an amenable number.

149649081 is a deficient number, since it is larger than the sum of its proper divisors (54693447).

149649081 is a wasteful number, since it uses less digits than its factorization.

149649081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2992.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 149649081 is about 12233.1141170186. The cubic root of 149649081 is about 530.9146198564.

It can be divided in two parts, 149 and 649081, that added together give a triangular number (649230 = T₁₁₃₉).

The spelling of 149649081 in words is "one hundred forty-nine million, six hundred forty-nine thousand, eighty-one".