135747881 has 2 divisors, whose sum is σ = 135747882. Its totient is φ = 135747880.

The previous prime is 135747851. The next prime is 135747971. The reversal of 135747881 is 188747531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130416400 + 5331481 = 11420^2 + 2309^2 .

It is a cyclic number.

It is not a de Polignac number, because 135747881 - 2²² = 131553577 is a prime.

It is a super-2 number, since 2×135747881² = 36854974391980322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (135747851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67873940 + 67873941.

It is an arithmetic number, because the mean of its divisors is an integer number (67873941).

Almost surely, 2^135747881 is an apocalyptic number.

It is an amenable number.

135747881 is a deficient number, since it is larger than the sum of its proper divisors (1).

135747881 is an equidigital number, since it uses as much as digits as its factorization.

135747881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188160, while the sum is 44.

The square root of 135747881 is about 11651.0892623823. The cubic root of 135747881 is about 513.9383426675.

The spelling of 135747881 in words is "one hundred thirty-five million, seven hundred forty-seven thousand, eight hundred eighty-one".