133461649 has 4 divisors (see below), whose sum is σ = 133505136. Its totient is φ = 133418164.

The previous prime is 133461619. The next prime is 133461689. The reversal of 133461649 is 946164331.

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: 946164331 = 7 ⋅135166333.

It is a cyclic number.

It is not a de Polignac number, because 133461649 - 2²³ = 125073041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133461619) 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, 16759 + ... + 23404.

It is an arithmetic number, because the mean of its divisors is an integer number (33376284).

Almost surely, 2^133461649 is an apocalyptic number.

It is an amenable number.

133461649 is a deficient number, since it is larger than the sum of its proper divisors (43487).

133461649 is an equidigital number, since it uses as much as digits as its factorization.

133461649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43486.

The product of its digits is 46656, while the sum is 37.

The square root of 133461649 is about 11552.5602790031. The cubic root of 133461649 is about 511.0367848949.

The spelling of 133461649 in words is "one hundred thirty-three million, four hundred sixty-one thousand, six hundred forty-nine".