138215940403 has 2 divisors, whose sum is σ = 138215940404. Its totient is φ = 138215940402.

The previous prime is 138215940391. The next prime is 138215940437. The reversal of 138215940403 is 304049512831.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138215940403 is a prime.

It is not a weakly prime, because it can be changed into another prime (138215940503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69107970201 + 69107970202.

It is an arithmetic number, because the mean of its divisors is an integer number (69107970202).

Almost surely, 2^138215940403 is an apocalyptic number.

138215940403 is a deficient number, since it is larger than the sum of its proper divisors (1).

138215940403 is an equidigital number, since it uses as much as digits as its factorization.

138215940403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 138215940403 in words is "one hundred thirty-eight billion, two hundred fifteen million, nine hundred forty thousand, four hundred three".