132978857 has 4 divisors (see below), whose sum is σ = 145067856. Its totient is φ = 120889860.

The previous prime is 132978827. The next prime is 132978869. The reversal of 132978857 is 758879231.

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: 758879231 = 11 ⋅68989021.

It is a cyclic number.

It is not a de Polignac number, because 132978857 - 2²² = 128784553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (132978817) 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, 6044483 + ... + 6044504.

It is an arithmetic number, because the mean of its divisors is an integer number (36266964).

Almost surely, 2^132978857 is an apocalyptic number.

It is an amenable number.

132978857 is a deficient number, since it is larger than the sum of its proper divisors (12088999).

132978857 is a wasteful number, since it uses less digits than its factorization.

132978857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12088998.

The product of its digits is 846720, while the sum is 50.

The square root of 132978857 is about 11531.6458929331. The cubic root of 132978857 is about 510.4198221998.

The spelling of 132978857 in words is "one hundred thirty-two million, nine hundred seventy-eight thousand, eight hundred fifty-seven".