133120691 has 6 divisors (see below), whose sum is σ = 146322876. Its totient is φ = 121018700.

The previous prime is 133120657. The next prime is 133120699. The reversal of 133120691 is 196021331.

It is not a de Polignac number, because 133120691 - 2⁶ = 133120627 is a prime.

It is a super-2 number, since 2×133120691² = 35442236744634962, which contains 22 as substring.

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 133120691.

It is not an unprimeable number, because it can be changed into a prime (133120699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 549965 + ... + 550206.

It is an arithmetic number, because the mean of its divisors is an integer number (24387146).

Almost surely, 2^133120691 is an apocalyptic number.

133120691 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

133120691 is a deficient number, since it is larger than the sum of its proper divisors (13202185).

133120691 is a wasteful number, since it uses less digits than its factorization.

133120691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100193 (or 1100182 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 133120691 is about 11537.7940265893. The cubic root of 133120691 is about 510.6012273829.

It can be divided in two parts, 1331 and 20691, that added together give a palindrome (22022).

The spelling of 133120691 in words is "one hundred thirty-three million, one hundred twenty thousand, six hundred ninety-one".