134787131 has 4 divisors (see below), whose sum is σ = 138074664. Its totient is φ = 131499600.

The previous prime is 134787113. The next prime is 134787137. The reversal of 134787131 is 131787431.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134787131 is a prime.

It is a super-2 number, since 2×134787131² = 36335141366422322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 134787091 and 134787100.

It is not an unprimeable number, because it can be changed into a prime (134787137) 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, 1643705 + ... + 1643786.

It is an arithmetic number, because the mean of its divisors is an integer number (34518666).

Almost surely, 2^134787131 is an apocalyptic number.

134787131 is a deficient number, since it is larger than the sum of its proper divisors (3287533).

134787131 is an equidigital number, since it uses as much as digits as its factorization.

134787131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3287532.

The product of its digits is 14112, while the sum is 35.

The square root of 134787131 is about 11609.7860014731. The cubic root of 134787131 is about 512.7230118865.

The spelling of 134787131 in words is "one hundred thirty-four million, seven hundred eighty-seven thousand, one hundred thirty-one".