133959731 has 2 divisors, whose sum is σ = 133959732. Its totient is φ = 133959730.

The previous prime is 133959713. The next prime is 133959743. The reversal of 133959731 is 137959331.

Together with previous prime (133959713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133959731 - 2⁶ = 133959667 is a prime.

It is a super-2 number, since 2×133959731² = 35890419059184722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (133959701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66979865 + 66979866.

It is an arithmetic number, because the mean of its divisors is an integer number (66979866).

Almost surely, 2^133959731 is an apocalyptic number.

133959731 is a deficient number, since it is larger than the sum of its proper divisors (1).

133959731 is an equidigital number, since it uses as much as digits as its factorization.

133959731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76545, while the sum is 41.

The square root of 133959731 is about 11574.0974162135. The cubic root of 133959731 is about 511.6717294230.

The spelling of 133959731 in words is "one hundred thirty-three million, nine hundred fifty-nine thousand, seven hundred thirty-one".