149651623 has 8 divisors (see below), whose sum is σ = 163345680. Its totient is φ = 135972480.

The previous prime is 149651617. The next prime is 149651627. The reversal of 149651623 is 326156941.

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 149651623 - 2⁹ = 149651111 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 (149651627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33273 + ... + 37501.

It is an arithmetic number, because the mean of its divisors is an integer number (20418210).

Almost surely, 2^149651623 is an apocalyptic number.

149651623 is a deficient number, since it is larger than the sum of its proper divisors (13694057).

149651623 is a wasteful number, since it uses less digits than its factorization.

149651623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7457.

The product of its digits is 38880, while the sum is 37.

The square root of 149651623 is about 12233.2180148970. The cubic root of 149651623 is about 530.9176259498.

The spelling of 149651623 in words is "one hundred forty-nine million, six hundred fifty-one thousand, six hundred twenty-three".