131385634 has 4 divisors (see below), whose sum is σ = 197078454. Its totient is φ = 65692816.

The previous prime is 131385629. The next prime is 131385641. The reversal of 131385634 is 436583131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 436583131 = 359 ⋅1216109.

It can be written as a sum of positive squares in only one way, i.e., 130028409 + 1357225 = 11403^2 + 1165^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 131385634.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32846407 + ... + 32846410.

Almost surely, 2^131385634 is an apocalyptic number.

131385634 is a deficient number, since it is larger than the sum of its proper divisors (65692820).

131385634 is an equidigital number, since it uses as much as digits as its factorization.

131385634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65692819.

The product of its digits is 25920, while the sum is 34.

The square root of 131385634 is about 11462.3572619248. The cubic root of 131385634 is about 508.3731757956.

The spelling of 131385634 in words is "one hundred thirty-one million, three hundred eighty-five thousand, six hundred thirty-four".