131380778 has 8 divisors (see below), whose sum is σ = 197917668. Its totient is φ = 65408224.

The previous prime is 131380757. The next prime is 131380789. The reversal of 131380778 is 877083131.

It can be written as a sum of positive squares in 2 ways, for example, as 130119649 + 1261129 = 11407^2 + 1123^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140501 + ... + 141432.

Almost surely, 2^131380778 is an apocalyptic number.

131380778 is a deficient number, since it is larger than the sum of its proper divisors (66536890).

131380778 is a wasteful number, since it uses less digits than its factorization.

131380778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282168.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 131380778 is about 11462.1454361738. The cubic root of 131380778 is about 508.3669125777.

The spelling of 131380778 in words is "one hundred thirty-one million, three hundred eighty thousand, seven hundred seventy-eight".