149913813 has 8 divisors (see below), whose sum is σ = 228440128. Its totient is φ = 85665024.

The previous prime is 149913787. The next prime is 149913859. The reversal of 149913813 is 318319941.

It is a happy number.

149913813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 149913813 - 2²⁰ = 148865237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149911813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3569356 + ... + 3569397.

It is an arithmetic number, because the mean of its divisors is an integer number (28555016).

Almost surely, 2^149913813 is an apocalyptic number.

It is an amenable number.

149913813 is a deficient number, since it is larger than the sum of its proper divisors (78526315).

149913813 is an equidigital number, since it uses as much as digits as its factorization.

149913813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7138763.

The product of its digits is 23328, while the sum is 39.

The square root of 149913813 is about 12243.9296388047. The cubic root of 149913813 is about 531.2275013678.

The spelling of 149913813 in words is "one hundred forty-nine million, nine hundred thirteen thousand, eight hundred thirteen".