131435387 has 4 divisors (see below), whose sum is σ = 131472936. Its totient is φ = 131397840.

The previous prime is 131435377. The next prime is 131435399. The reversal of 131435387 is 783534131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 783534131 = 17 ⋅46090243.

It is a cyclic number.

It is not a de Polignac number, because 131435387 - 2¹⁰ = 131434363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131435327) 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, 12914 + ... + 20727.

It is an arithmetic number, because the mean of its divisors is an integer number (32868234).

Almost surely, 2^131435387 is an apocalyptic number.

131435387 is a deficient number, since it is larger than the sum of its proper divisors (37549).

131435387 is an equidigital number, since it uses as much as digits as its factorization.

131435387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37548.

The product of its digits is 30240, while the sum is 35.

The square root of 131435387 is about 11464.5273343475. The cubic root of 131435387 is about 508.4373378044.

The spelling of 131435387 in words is "one hundred thirty-one million, four hundred thirty-five thousand, three hundred eighty-seven".