149688647 has 4 divisors (see below), whose sum is σ = 151583520. Its totient is φ = 147793776.

The previous prime is 149688611. The next prime is 149688659. The reversal of 149688647 is 746886941.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 149688647 - 2⁸ = 149688391 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 (149688607) 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, 947318 + ... + 947475.

It is an arithmetic number, because the mean of its divisors is an integer number (37895880).

Almost surely, 2^149688647 is an apocalyptic number.

149688647 is a deficient number, since it is larger than the sum of its proper divisors (1894873).

149688647 is an equidigital number, since it uses as much as digits as its factorization.

149688647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1894872.

The product of its digits is 2322432, while the sum is 53.

The square root of 149688647 is about 12234.7311780848. The cubic root of 149688647 is about 530.9614055694.

The spelling of 149688647 in words is "one hundred forty-nine million, six hundred eighty-eight thousand, six hundred forty-seven".