133938399431 has 2 divisors, whose sum is σ = 133938399432. Its totient is φ = 133938399430.

The previous prime is 133938399421. The next prime is 133938399481. The reversal of 133938399431 is 134993839331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133938399431 - 2⁶ = 133938399367 is a prime.

It is a super-2 number, since 2×133938399431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133938399401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66969199715 + 66969199716.

It is an arithmetic number, because the mean of its divisors is an integer number (66969199716).

Almost surely, 2^133938399431 is an apocalyptic number.

133938399431 is a deficient number, since it is larger than the sum of its proper divisors (1).

133938399431 is an equidigital number, since it uses as much as digits as its factorization.

133938399431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5668704, while the sum is 56.

The spelling of 133938399431 in words is "one hundred thirty-three billion, nine hundred thirty-eight million, three hundred ninety-nine thousand, four hundred thirty-one".