149389633 has 4 divisors (see below), whose sum is σ = 149417860. Its totient is φ = 149361408.

The previous prime is 149389613. The next prime is 149389661. The reversal of 149389633 is 336983941.

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 148060224 + 1329409 = 12168^2 + 1153^2 .

It is a 3-Lehmer number, since φ(149389633) divides (149389633-1)³.

It is a cyclic number.

It is not a de Polignac number, because 149389633 - 2⁵ = 149389601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149389613) 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, 3528 + ... + 17641.

It is an arithmetic number, because the mean of its divisors is an integer number (37354465).

It is a Poulet number, since it divides 2^149389632-1.

Almost surely, 2^149389633 is an apocalyptic number.

149389633 is the 7057-th octagonal number.

It is an amenable number.

149389633 is a deficient number, since it is larger than the sum of its proper divisors (28227).

149389633 is an equidigital number, since it uses as much as digits as its factorization.

149389633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28226.

The product of its digits is 419904, while the sum is 46.

The square root of 149389633 is about 12222.5051851083. The cubic root of 149389633 is about 530.6076251743.

The spelling of 149389633 in words is "one hundred forty-nine million, three hundred eighty-nine thousand, six hundred thirty-three".