133437431 has 2 divisors, whose sum is σ = 133437432. Its totient is φ = 133437430.

The previous prime is 133437413. The next prime is 133437443. The reversal of 133437431 is 134734331.

Together with previous prime (133437413) 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 (134734331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133437431 - 2¹⁴ = 133421047 is a prime.

It is a super-2 number, since 2×133437431² = 35611095983759522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 133437394 and 133437403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133437461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66718715 + 66718716.

It is an arithmetic number, because the mean of its divisors is an integer number (66718716).

Almost surely, 2^133437431 is an apocalyptic number.

133437431 is a deficient number, since it is larger than the sum of its proper divisors (1).

133437431 is an equidigital number, since it uses as much as digits as its factorization.

133437431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 29.

The square root of 133437431 is about 11551.5120655263. The cubic root of 133437431 is about 511.0058720506.

The spelling of 133437431 in words is "one hundred thirty-three million, four hundred thirty-seven thousand, four hundred thirty-one".