149018681 has 8 divisors (see below), whose sum is σ = 170705664. Its totient is φ = 127431360.

The previous prime is 149018671. The next prime is 149018687. The reversal of 149018681 is 186810941.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-149018681 is a prime.

It is a super-2 number, since 2×149018681² = 44413134573959522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149018687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21680 + ... + 27713.

It is an arithmetic number, because the mean of its divisors is an integer number (21338208).

Almost surely, 2^149018681 is an apocalyptic number.

It is an amenable number.

149018681 is a deficient number, since it is larger than the sum of its proper divisors (21686983).

149018681 is an equidigital number, since it uses as much as digits as its factorization.

149018681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49831.

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 149018681 is about 12207.3207953261. The cubic root of 149018681 is about 530.1680741420.

The spelling of 149018681 in words is "one hundred forty-nine million, eighteen thousand, six hundred eighty-one".