149752691 has 8 divisors (see below), whose sum is σ = 163476144. Its totient is φ = 136047520.

The previous prime is 149752663. The next prime is 149752693. The reversal of 149752691 is 196257941.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149752691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149752693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17021 + ... + 24273.

It is an arithmetic number, because the mean of its divisors is an integer number (20434518).

Almost surely, 2^149752691 is an apocalyptic number.

149752691 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

149752691 is a deficient number, since it is larger than the sum of its proper divisors (13723453).

149752691 is a wasteful number, since it uses less digits than its factorization.

149752691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9141.

The product of its digits is 136080, while the sum is 44.

The square root of 149752691 is about 12237.3482013057. The cubic root of 149752691 is about 531.0371183783.

The spelling of 149752691 in words is "one hundred forty-nine million, seven hundred fifty-two thousand, six hundred ninety-one".