149721696 has 120 divisors (see below), whose sum is σ = 450061920. Its totient is φ = 48805632.

The previous prime is 149721673. The next prime is 149721701. The reversal of 149721696 is 696127941.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 121210 + ... + 122438.

It is an arithmetic number, because the mean of its divisors is an integer number (3750516).

Almost surely, 2^149721696 is an apocalyptic number.

149721696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 149721696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225030960).

149721696 is an abundant number, since it is smaller than the sum of its proper divisors (300340224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

149721696 is a wasteful number, since it uses less digits than its factorization.

149721696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298 (or 1281 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 149721696 is about 12236.0817257813. The cubic root of 149721696 is about 531.0004787892. Note that the first 3 decimals are identical.

The spelling of 149721696 in words is "one hundred forty-nine million, seven hundred twenty-one thousand, six hundred ninety-six".