149791423 has 2 divisors, whose sum is σ = 149791424. Its totient is φ = 149791422.

The previous prime is 149791393. The next prime is 149791441. The reversal of 149791423 is 324197941.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 149791423 - 2⁵ = 149791391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149791463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74895711 + 74895712.

It is an arithmetic number, because the mean of its divisors is an integer number (74895712).

Almost surely, 2^149791423 is an apocalyptic number.

149791423 is a deficient number, since it is larger than the sum of its proper divisors (1).

149791423 is an equidigital number, since it uses as much as digits as its factorization.

149791423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 149791423 is about 12238.9306313910. The cubic root of 149791423 is about 531.0828968693.

The spelling of 149791423 in words is "one hundred forty-nine million, seven hundred ninety-one thousand, four hundred twenty-three".