149967923 has 4 divisors (see below), whose sum is σ = 171391920. Its totient is φ = 128543928.

The previous prime is 149967913. The next prime is 149967943. The reversal of 149967923 is 329769941.

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 149967923 - 2⁴ = 149967907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149967913) 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, 10711988 + ... + 10712001.

It is an arithmetic number, because the mean of its divisors is an integer number (42847980).

Almost surely, 2^149967923 is an apocalyptic number.

149967923 is a deficient number, since it is larger than the sum of its proper divisors (21423997).

149967923 is an equidigital number, since it uses as much as digits as its factorization.

149967923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21423996.

The product of its digits is 734832, while the sum is 50.

The square root of 149967923 is about 12246.1391058570. The cubic root of 149967923 is about 531.2914075591.

The spelling of 149967923 in words is "one hundred forty-nine million, nine hundred sixty-seven thousand, nine hundred twenty-three".