149157709 has 8 divisors (see below), whose sum is σ = 155496960. Its totient is φ = 142914000.

The previous prime is 149157707. The next prime is 149157721. The reversal of 149157709 is 907751941.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 149157709 - 2¹ = 149157707 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149157707) 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 7 ways as a sum of consecutive naturals, for example, 20689 + ... + 26950.

It is an arithmetic number, because the mean of its divisors is an integer number (19437120).

Almost surely, 2^149157709 is an apocalyptic number.

It is an amenable number.

149157709 is a deficient number, since it is larger than the sum of its proper divisors (6339251).

149157709 is a wasteful number, since it uses less digits than its factorization.

149157709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47771.

The product of its (nonzero) digits is 79380, while the sum is 43.

The square root of 149157709 is about 12213.0139195859. The cubic root of 149157709 is about 530.3328975413.

The spelling of 149157709 in words is "one hundred forty-nine million, one hundred fifty-seven thousand, seven hundred nine".