134953561 has 4 divisors (see below), whose sum is σ = 142056400. Its totient is φ = 127850724.

The previous prime is 134953549. The next prime is 134953573. The reversal of 134953561 is 165359431.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 165359431 = 109 ⋅1517059.

It is an interprime number because it is at equal distance from previous prime (134953549) and next prime (134953573).

It is a cyclic number.

It is not a de Polignac number, because 134953561 - 2¹⁷ = 134822489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 134953561.

It is not an unprimeable number, because it can be changed into a prime (134953661) 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, 3551391 + ... + 3551428.

It is an arithmetic number, because the mean of its divisors is an integer number (35514100).

Almost surely, 2^134953561 is an apocalyptic number.

It is an amenable number.

134953561 is a deficient number, since it is larger than the sum of its proper divisors (7102839).

134953561 is an equidigital number, since it uses as much as digits as its factorization.

134953561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7102838.

The product of its digits is 48600, while the sum is 37.

The square root of 134953561 is about 11616.9514503591. The cubic root of 134953561 is about 512.9339553510.

The spelling of 134953561 in words is "one hundred thirty-four million, nine hundred fifty-three thousand, five hundred sixty-one".