135499061 has 4 divisors (see below), whose sum is σ = 143469612. Its totient is φ = 127528512.

The previous prime is 135499057. The next prime is 135499079. The reversal of 135499061 is 160994531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48916036 + 86583025 = 6994^2 + 9305^2 .

It is a cyclic number.

It is not a de Polignac number, because 135499061 - 2² = 135499057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135499031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3985250 + ... + 3985283.

It is an arithmetic number, because the mean of its divisors is an integer number (35867403).

Almost surely, 2^135499061 is an apocalyptic number.

It is an amenable number.

135499061 is a deficient number, since it is larger than the sum of its proper divisors (7970551).

135499061 is an equidigital number, since it uses as much as digits as its factorization.

135499061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7970550.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 135499061 is about 11640.4063932493. The cubic root of 135499061 is about 513.6241416923.

The spelling of 135499061 in words is "one hundred thirty-five million, four hundred ninety-nine thousand, sixty-one".