132449781 has 4 divisors (see below), whose sum is σ = 176599712. Its totient is φ = 88299852.

The previous prime is 132449743. The next prime is 132449783. The reversal of 132449781 is 187944231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 132449781 - 2⁹ = 132449269 is a prime.

It is a super-2 number, since 2×132449781² = 35085888973895922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (132449783) 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, 22074961 + ... + 22074966.

It is an arithmetic number, because the mean of its divisors is an integer number (44149928).

Almost surely, 2^132449781 is an apocalyptic number.

It is an amenable number.

132449781 is a deficient number, since it is larger than the sum of its proper divisors (44149931).

132449781 is an equidigital number, since it uses as much as digits as its factorization.

132449781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44149930.

The product of its digits is 48384, while the sum is 39.

The square root of 132449781 is about 11508.6828525249. The cubic root of 132449781 is about 509.7419956053.

The spelling of 132449781 in words is "one hundred thirty-two million, four hundred forty-nine thousand, seven hundred eighty-one".