149721403 has 16 divisors (see below), whose sum is σ = 167378400. Its totient is φ = 132975360.

The previous prime is 149721391. The next prime is 149721427. The reversal of 149721403 is 304127941.

149721403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 149721403 - 2⁵ = 149721371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149121403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153708 + ... + 154678.

It is an arithmetic number, because the mean of its divisors is an integer number (10461150).

Almost surely, 2^149721403 is an apocalyptic number.

149721403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

149721403 is a deficient number, since it is larger than the sum of its proper divisors (17656997).

149721403 is a wasteful number, since it uses less digits than its factorization.

149721403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 149721403 is about 12236.0697529885. The cubic root of 149721403 is about 531.0001324060. Note that the first 3 decimals are identical.

The spelling of 149721403 in words is "one hundred forty-nine million, seven hundred twenty-one thousand, four hundred three".