149031813 has 32 divisors (see below), whose sum is σ = 232678656. Its totient is φ = 83086848.

The previous prime is 149031797. The next prime is 149031821. The reversal of 149031813 is 318130941.

It is not a de Polignac number, because 149031813 - 2⁴ = 149031797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149031823) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 325881 + ... + 326337.

It is an arithmetic number, because the mean of its divisors is an integer number (7271208).

Almost surely, 2^149031813 is an apocalyptic number.

It is an amenable number.

149031813 is a deficient number, since it is larger than the sum of its proper divisors (83646843).

149031813 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (149031812) it forms an eRAP, since the sums of their prime factors are consecutive (812 and 813).

149031813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 149031813 is about 12207.8586574387. The cubic root of 149031813 is about 530.1836470501.

The spelling of 149031813 in words is "one hundred forty-nine million, thirty-one thousand, eight hundred thirteen".