135531337973 has 2 divisors, whose sum is σ = 135531337974. Its totient is φ = 135531337972.

The previous prime is 135531337969. The next prime is 135531338051. The reversal of 135531337973 is 379733135531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124519354129 + 11011983844 = 352873^2 + 104938^2 .

It is a cyclic number.

It is not a de Polignac number, because 135531337973 - 2² = 135531337969 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135531337913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67765668986 + 67765668987.

It is an arithmetic number, because the mean of its divisors is an integer number (67765668987).

Almost surely, 2^135531337973 is an apocalyptic number.

It is an amenable number.

135531337973 is a deficient number, since it is larger than the sum of its proper divisors (1).

135531337973 is an equidigital number, since it uses as much as digits as its factorization.

135531337973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2679075, while the sum is 50.

The spelling of 135531337973 in words is "one hundred thirty-five billion, five hundred thirty-one million, three hundred thirty-seven thousand, nine hundred seventy-three".