135756431 has 2 divisors, whose sum is σ = 135756432. Its totient is φ = 135756430.

The previous prime is 135756427. The next prime is 135756437. The reversal of 135756431 is 134657531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135756431 - 2² = 135756427 is a prime.

It is a super-2 number, since 2×135756431² = 36859617115715522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 135756391 and 135756400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135756437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67878215 + 67878216.

It is an arithmetic number, because the mean of its divisors is an integer number (67878216).

Almost surely, 2^135756431 is an apocalyptic number.

135756431 is a deficient number, since it is larger than the sum of its proper divisors (1).

135756431 is an equidigital number, since it uses as much as digits as its factorization.

135756431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 35.

The square root of 135756431 is about 11651.4561750882. The cubic root of 135756431 is about 513.9491324751.

The spelling of 135756431 in words is "one hundred thirty-five million, seven hundred fifty-six thousand, four hundred thirty-one".