135467923499981 has 2 divisors, whose sum is σ = 135467923499982. Its totient is φ = 135467923499980.

The previous prime is 135467923499977. The next prime is 135467923500073. The reversal of 135467923499981 is 189994329764531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117690147523081 + 17777775976900 = 10848509^2 + 4216370^2 .

It is a cyclic number.

It is not a de Polignac number, because 135467923499981 - 2² = 135467923499977 is a prime.

It is a super-2 number, since 2×135467923499981² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 135467923499896 and 135467923499905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135467923499971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67733961749990 + 67733961749991.

It is an arithmetic number, because the mean of its divisors is an integer number (67733961749991).

Almost surely, 2^{135467923499981} is an apocalyptic number.

It is an amenable number.

135467923499981 is a deficient number, since it is larger than the sum of its proper divisors (1).

135467923499981 is an equidigital number, since it uses as much as digits as its factorization.

135467923499981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3174474240, while the sum is 80.

The spelling of 135467923499981 in words is "one hundred thirty-five trillion, four hundred sixty-seven billion, nine hundred twenty-three million, four hundred ninety-nine thousand, nine hundred eighty-one".