149837689 has 4 divisors (see below), whose sum is σ = 150194020. Its totient is φ = 149481360.

The previous prime is 149837687. The next prime is 149837729. The reversal of 149837689 is 986738941.

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 8037225 + 141800464 = 2835^2 + 11908^2 .

It is a cyclic number.

It is not a de Polignac number, because 149837689 - 2¹ = 149837687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149837687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177534 + ... + 178375.

It is an arithmetic number, because the mean of its divisors is an integer number (37548505).

Almost surely, 2^149837689 is an apocalyptic number.

It is an amenable number.

149837689 is a deficient number, since it is larger than the sum of its proper divisors (356331).

149837689 is an equidigital number, since it uses as much as digits as its factorization.

149837689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356330.

The product of its digits is 2612736, while the sum is 55.

The square root of 149837689 is about 12240.8206015773. The cubic root of 149837689 is about 531.1375696748.

The spelling of 149837689 in words is "one hundred forty-nine million, eight hundred thirty-seven thousand, six hundred eighty-nine".