149784709 has 4 divisors (see below), whose sum is σ = 149909004. Its totient is φ = 149660416.

The previous prime is 149784673. The next prime is 149784721. The reversal of 149784709 is 907487941.

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 57047809 + 92736900 = 7553^2 + 9630^2 .

It is a cyclic number.

It is not a de Polignac number, because 149784709 - 2¹⁵ = 149751941 is a prime.

It is a super-3 number, since 3×149784709³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149784109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60322 + ... + 62755.

It is an arithmetic number, because the mean of its divisors is an integer number (37477251).

Almost surely, 2^149784709 is an apocalyptic number.

It is an amenable number.

149784709 is a deficient number, since it is larger than the sum of its proper divisors (124295).

149784709 is a wasteful number, since it uses less digits than its factorization.

149784709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124294.

The product of its (nonzero) digits is 508032, while the sum is 49.

The square root of 149784709 is about 12238.6563396477. The cubic root of 149784709 is about 531.0749619605.

The spelling of 149784709 in words is "one hundred forty-nine million, seven hundred eighty-four thousand, seven hundred nine".