134649381 has 4 divisors (see below), whose sum is σ = 179532512. Its totient is φ = 89766252.

The previous prime is 134649377. The next prime is 134649391. The reversal of 134649381 is 183946431.

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: 183946431 = 3 ⋅61315477.

It is not a de Polignac number, because 134649381 - 2² = 134649377 is a prime.

It is a super-2 number, since 2×134649381² = 36260911607366322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134649301) 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, 22441561 + ... + 22441566.

It is an arithmetic number, because the mean of its divisors is an integer number (44883128).

Almost surely, 2^134649381 is an apocalyptic number.

It is an amenable number.

134649381 is a deficient number, since it is larger than the sum of its proper divisors (44883131).

134649381 is an equidigital number, since it uses as much as digits as its factorization.

134649381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44883130.

The product of its digits is 62208, while the sum is 39.

The square root of 134649381 is about 11603.8519897489. The cubic root of 134649381 is about 512.5482878158.

The spelling of 134649381 in words is "one hundred thirty-four million, six hundred forty-nine thousand, three hundred eighty-one".