131890886938 has 4 divisors (see below), whose sum is σ = 197836330410. Its totient is φ = 65945443468.

The previous prime is 131890886923. The next prime is 131890886957. The reversal of 131890886938 is 839688098131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 127361193129 + 4529693809 = 356877^2 + 67303^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 131890886938.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32972721733 + ... + 32972721736.

Almost surely, 2^131890886938 is an apocalyptic number.

131890886938 is a deficient number, since it is larger than the sum of its proper divisors (65945443472).

131890886938 is an equidigital number, since it uses as much as digits as its factorization.

131890886938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65945443471.

The product of its (nonzero) digits is 17915904, while the sum is 64.

The spelling of 131890886938 in words is "one hundred thirty-one billion, eight hundred ninety million, eight hundred eighty-six thousand, nine hundred thirty-eight".