149545771 has 4 divisors (see below), whose sum is σ = 149947072. Its totient is φ = 149144472.

The previous prime is 149545757. The next prime is 149545777. The reversal of 149545771 is 177545941.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 177545941 = 103 ⋅1723747.

It is a cyclic number.

It is not a de Polignac number, because 149545771 - 2⁹ = 149545259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149545777) 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, 200091 + ... + 200836.

It is an arithmetic number, because the mean of its divisors is an integer number (37486768).

Almost surely, 2^149545771 is an apocalyptic number.

149545771 is a deficient number, since it is larger than the sum of its proper divisors (401301).

149545771 is an equidigital number, since it uses as much as digits as its factorization.

149545771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401300.

The product of its digits is 176400, while the sum is 43.

The square root of 149545771 is about 12228.8908327779. The cubic root of 149545771 is about 530.7924197167.

The spelling of 149545771 in words is "one hundred forty-nine million, five hundred forty-five thousand, seven hundred seventy-one".