132978449 has 4 divisors (see below), whose sum is σ = 133296240. Its totient is φ = 132660660.

The previous prime is 132978383. The next prime is 132978467. The reversal of 132978449 is 944879231.

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, and also an emirpimes, since its reverse is a distinct semiprime: 944879231 = 97 ⋅9741023.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-132978449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (132978149) 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, 158267 + ... + 159104.

It is an arithmetic number, because the mean of its divisors is an integer number (33324060).

Almost surely, 2^132978449 is an apocalyptic number.

It is an amenable number.

132978449 is a deficient number, since it is larger than the sum of its proper divisors (317791).

132978449 is an equidigital number, since it uses as much as digits as its factorization.

132978449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317790.

The product of its digits is 435456, while the sum is 47.

The square root of 132978449 is about 11531.6282024699. The cubic root of 132978449 is about 510.4193001832.

The spelling of 132978449 in words is "one hundred thirty-two million, nine hundred seventy-eight thousand, four hundred forty-nine".