135504491 has 2 divisors, whose sum is σ = 135504492. Its totient is φ = 135504490.

The previous prime is 135504487. The next prime is 135504493. The reversal of 135504491 is 194405531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135504491 - 2² = 135504487 is a prime.

It is a super-2 number, since 2×135504491² = 36722934162338162, which contains 22 as substring.

Together with 135504493, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_7672433 and since 135504491 and 7672433 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (135504493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67752245 + 67752246.

It is an arithmetic number, because the mean of its divisors is an integer number (67752246).

Almost surely, 2^135504491 is an apocalyptic number.

135504491 is a deficient number, since it is larger than the sum of its proper divisors (1).

135504491 is an equidigital number, since it uses as much as digits as its factorization.

135504491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 135504491 is about 11640.6396301921. The cubic root of 135504491 is about 513.6310026053.

The spelling of 135504491 in words is "one hundred thirty-five million, five hundred four thousand, four hundred ninety-one".