149019669 has 20 divisors (see below), whose sum is σ = 222947340. Its totient is φ = 99195840.

The previous prime is 149019659. The next prime is 149019769. The reversal of 149019669 is 966910941.

It can be written as a sum of positive squares in 2 ways, for example, as 90497169 + 58522500 = 9513^2 + 7650^2 .

It is not a de Polignac number, because 149019669 - 2²³ = 140631061 is a prime.

It is a super-2 number, since 2×149019669² = 44413723497739122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149019659) 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 19 ways as a sum of consecutive naturals, for example, 85729 + ... + 87449.

It is an arithmetic number, because the mean of its divisors is an integer number (11147367).

Almost surely, 2^149019669 is an apocalyptic number.

It is an amenable number.

149019669 is a deficient number, since it is larger than the sum of its proper divisors (73927671).

149019669 is a wasteful number, since it uses less digits than its factorization.

149019669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2802 (or 2793 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 149019669 is about 12207.3612627791. The cubic root of 149019669 is about 530.1692458182.

The spelling of 149019669 in words is "one hundred forty-nine million, nineteen thousand, six hundred sixty-nine".