149740823 has 4 divisors (see below), whose sum is σ = 149896008. Its totient is φ = 149585640.

The previous prime is 149740817. The next prime is 149740831. The reversal of 149740823 is 328047941.

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 149740823 - 2⁸ = 149740567 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 (149740853) 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, 76136 + ... + 78077.

It is an arithmetic number, because the mean of its divisors is an integer number (37474002).

Almost surely, 2^149740823 is an apocalyptic number.

149740823 is a deficient number, since it is larger than the sum of its proper divisors (155185).

149740823 is an equidigital number, since it uses as much as digits as its factorization.

149740823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155184.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 149740823 is about 12236.8632827208. The cubic root of 149740823 is about 531.0230896598.

The spelling of 149740823 in words is "one hundred forty-nine million, seven hundred forty thousand, eight hundred twenty-three".