123365131009 has 2 divisors, whose sum is σ = 123365131010. Its totient is φ = 123365131008.

The previous prime is 123365131003. The next prime is 123365131049. The reversal of 123365131009 is 900131563321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86365454400 + 36999676609 = 293880^2 + 192353^2 .

It is a cyclic number.

It is not a de Polignac number, because 123365131009 - 2²³ = 123356742401 is a prime.

It is not a weakly prime, because it can be changed into another prime (123365131003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61682565504 + 61682565505.

It is an arithmetic number, because the mean of its divisors is an integer number (61682565505).

Almost surely, 2^123365131009 is an apocalyptic number.

It is an amenable number.

123365131009 is a deficient number, since it is larger than the sum of its proper divisors (1).

123365131009 is an equidigital number, since it uses as much as digits as its factorization.

123365131009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 34.

The spelling of 123365131009 in words is "one hundred twenty-three billion, three hundred sixty-five million, one hundred thirty-one thousand, nine".