133776431 has 2 divisors, whose sum is σ = 133776432. Its totient is φ = 133776430.

The previous prime is 133776413. The next prime is 133776437. The reversal of 133776431 is 134677331.

Together with previous prime (133776413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (134677331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133776431 - 2⁶ = 133776367 is a prime.

It is a super-2 number, since 2×133776431² = 35792266982195522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 133776391 and 133776400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133776437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66888215 + 66888216.

It is an arithmetic number, because the mean of its divisors is an integer number (66888216).

Almost surely, 2^133776431 is an apocalyptic number.

133776431 is a deficient number, since it is larger than the sum of its proper divisors (1).

133776431 is an equidigital number, since it uses as much as digits as its factorization.

133776431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 35.

The square root of 133776431 is about 11566.1761615497. The cubic root of 133776431 is about 511.4382457289.

The spelling of 133776431 in words is "one hundred thirty-three million, seven hundred seventy-six thousand, four hundred thirty-one".