132778237 has 4 divisors (see below), whose sum is σ = 136366876. Its totient is φ = 129189600.

The previous prime is 132778229. The next prime is 132778253. The reversal of 132778237 is 732877231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 732877231 = 31 ⋅23641201.

It can be written as a sum of positive squares in 2 ways, for example, as 93915481 + 38862756 = 9691^2 + 6234^2 .

It is a cyclic number.

It is not a de Polignac number, because 132778237 - 2³ = 132778229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 132778237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (132778297) 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, 1794264 + ... + 1794337.

It is an arithmetic number, because the mean of its divisors is an integer number (34091719).

Almost surely, 2^132778237 is an apocalyptic number.

It is an amenable number.

132778237 is a deficient number, since it is larger than the sum of its proper divisors (3588639).

132778237 is an equidigital number, since it uses as much as digits as its factorization.

132778237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3588638.

The product of its digits is 98784, while the sum is 40.

The square root of 132778237 is about 11522.9439380742. The cubic root of 132778237 is about 510.1630095352.

The spelling of 132778237 in words is "one hundred thirty-two million, seven hundred seventy-eight thousand, two hundred thirty-seven".