149309723 has 4 divisors (see below), whose sum is σ = 149460480. Its totient is φ = 149158968.

The previous prime is 149309711. The next prime is 149309729. The reversal of 149309723 is 327903941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 327903941 = 97 ⋅3380453.

It is a cyclic number.

It is not a de Polignac number, because 149309723 - 2¹⁰ = 149308699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149309729) 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 3 ways as a sum of consecutive naturals, for example, 73883 + ... + 75876.

It is an arithmetic number, because the mean of its divisors is an integer number (37365120).

Almost surely, 2^149309723 is an apocalyptic number.

149309723 is a deficient number, since it is larger than the sum of its proper divisors (150757).

149309723 is an equidigital number, since it uses as much as digits as its factorization.

149309723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150756.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 149309723 is about 12219.2357780673. The cubic root of 149309723 is about 530.5129992021.

The spelling of 149309723 in words is "one hundred forty-nine million, three hundred nine thousand, seven hundred twenty-three".