149031811 has 4 divisors (see below), whose sum is σ = 149421312. Its totient is φ = 148642312.

The previous prime is 149031797. The next prime is 149031821. The reversal of 149031811 is 118130941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 118130941 = 577 ⋅204733.

It is a cyclic number.

It is not a de Polignac number, because 149031811 - 2¹¹ = 149029763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 149031811.

It is not an unprimeable number, because it can be changed into a prime (149031821) 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 3 ways as a sum of consecutive naturals, for example, 194176 + ... + 194941.

It is an arithmetic number, because the mean of its divisors is an integer number (37355328).

Almost surely, 2^149031811 is an apocalyptic number.

149031811 is a deficient number, since it is larger than the sum of its proper divisors (389501).

149031811 is an equidigital number, since it uses as much as digits as its factorization.

149031811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389500.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 149031811 is about 12207.8585755242. The cubic root of 149031811 is about 530.1836446784.

The spelling of 149031811 in words is "one hundred forty-nine million, thirty-one thousand, eight hundred eleven".