149081369 has 4 divisors (see below), whose sum is σ = 149256996. Its totient is φ = 148905744.

The previous prime is 149081357. The next prime is 149081389. The reversal of 149081369 is 963180941.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 90022144 + 59059225 = 9488^2 + 7685^2 .

It is a cyclic number.

It is not a de Polignac number, because 149081369 - 2¹² = 149077273 is a prime.

It is a super-2 number, since 2×149081369² = 44450509165828322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149081329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86534 + ... + 88239.

It is an arithmetic number, because the mean of its divisors is an integer number (37314249).

Almost surely, 2^149081369 is an apocalyptic number.

It is an amenable number.

149081369 is a deficient number, since it is larger than the sum of its proper divisors (175627).

149081369 is an equidigital number, since it uses as much as digits as its factorization.

149081369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175626.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 149081369 is about 12209.8881649260. Note that the first 3 decimals coincide. The cubic root of 149081369 is about 530.2424060238.

The spelling of 149081369 in words is "one hundred forty-nine million, eighty-one thousand, three hundred sixty-nine".