133011761 has 4 divisors (see below), whose sum is σ = 140012400. Its totient is φ = 126011124.

The previous prime is 133011751. The next prime is 133011763. The reversal of 133011761 is 167110331.

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: 167110331 = 3877 ⋅43103.

It is a cyclic number.

It is not a de Polignac number, because 133011761 - 2¹⁴ = 132995377 is a prime.

It is a super-2 number, since 2×133011761² = 35384257128642242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133011763) 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, 3500291 + ... + 3500328.

It is an arithmetic number, because the mean of its divisors is an integer number (35003100).

Almost surely, 2^133011761 is an apocalyptic number.

It is an amenable number.

133011761 is a deficient number, since it is larger than the sum of its proper divisors (7000639).

133011761 is an equidigital number, since it uses as much as digits as its factorization.

133011761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7000638.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 133011761 is about 11533.0724874164. The cubic root of 133011761 is about 510.4619177859.

The spelling of 133011761 in words is "one hundred thirty-three million, eleven thousand, seven hundred sixty-one".