135608623 has 2 divisors, whose sum is σ = 135608624. Its totient is φ = 135608622.

The previous prime is 135608597. The next prime is 135608647. The reversal of 135608623 is 326806531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135608623 - 2¹³ = 135600431 is a prime.

It is a super-2 number, since 2×135608623² = 36779397263912258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135608653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67804311 + 67804312.

It is an arithmetic number, because the mean of its divisors is an integer number (67804312).

Almost surely, 2^135608623 is an apocalyptic number.

135608623 is a deficient number, since it is larger than the sum of its proper divisors (1).

135608623 is an equidigital number, since it uses as much as digits as its factorization.

135608623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 135608623 is about 11645.1115494872. Note that the first 3 decimals coincide. The cubic root of 135608623 is about 513.7625400135.

The spelling of 135608623 in words is "one hundred thirty-five million, six hundred eight thousand, six hundred twenty-three".