134530391 has 4 divisors (see below), whose sum is σ = 139169400. Its totient is φ = 129891384.

The previous prime is 134530387. The next prime is 134530411. The reversal of 134530391 is 193035431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 193035431 = 2179 ⋅88589.

It is a cyclic number.

It is not a de Polignac number, because 134530391 - 2² = 134530387 is a prime.

It is a super-2 number, since 2×134530391² = 36196852205225762, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 4638979 = 134530391 / (1 + 3 + 4 + 5 + 3 + 0 + 3 + 9 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134530321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2319461 + ... + 2319518.

It is an arithmetic number, because the mean of its divisors is an integer number (34792350).

Almost surely, 2^134530391 is an apocalyptic number.

134530391 is a deficient number, since it is larger than the sum of its proper divisors (4639009).

134530391 is an equidigital number, since it uses as much as digits as its factorization.

134530391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4639008.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 134530391 is about 11598.7236797848. The cubic root of 134530391 is about 512.3972632455.

The spelling of 134530391 in words is "one hundred thirty-four million, five hundred thirty thousand, three hundred ninety-one".