134321987 has 4 divisors (see below), whose sum is σ = 134352456. Its totient is φ = 134291520.

The previous prime is 134321983. The next prime is 134322007. The reversal of 134321987 is 789123431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789123431 = 443 ⋅1781317.

It is a cyclic number.

It is not a de Polignac number, because 134321987 - 2² = 134321983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 134321987.

It is not an unprimeable number, because it can be changed into a prime (134321983) 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, 7214 + ... + 17907.

It is an arithmetic number, because the mean of its divisors is an integer number (33588114).

Almost surely, 2^134321987 is an apocalyptic number.

134321987 is a deficient number, since it is larger than the sum of its proper divisors (30469).

134321987 is an equidigital number, since it uses as much as digits as its factorization.

134321987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30468.

The product of its digits is 36288, while the sum is 38.

The square root of 134321987 is about 11589.7362782766. The cubic root of 134321987 is about 512.1325378620.

The spelling of 134321987 in words is "one hundred thirty-four million, three hundred twenty-one thousand, nine hundred eighty-seven".