131978455 has 8 divisors (see below), whose sum is σ = 180999072. Its totient is φ = 90499488.

The previous prime is 131978443. The next prime is 131978459. The reversal of 131978455 is 554879131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131978455 - 2²¹ = 129881303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131978459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1885372 + ... + 1885441.

It is an arithmetic number, because the mean of its divisors is an integer number (22624884).

Almost surely, 2^131978455 is an apocalyptic number.

131978455 is a deficient number, since it is larger than the sum of its proper divisors (49020617).

131978455 is an equidigital number, since it uses as much as digits as its factorization.

131978455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3770825.

The product of its digits is 151200, while the sum is 43.

The square root of 131978455 is about 11488.1876290388. The cubic root of 131978455 is about 509.1366335757.

The spelling of 131978455 in words is "one hundred thirty-one million, nine hundred seventy-eight thousand, four hundred fifty-five".