133980731 has 4 divisors (see below), whose sum is σ = 134007864. Its totient is φ = 133953600.

The previous prime is 133980713. The next prime is 133980739. The reversal of 133980731 is 137089331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133980731 - 2¹⁸ = 133718587 is a prime.

It is a super-2 number, since 2×133980731² = 35901672558588722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133980691 and 133980700.

It is not an unprimeable number, because it can be changed into a prime (133980739) 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 3 ways as a sum of consecutive naturals, for example, 3830 + ... + 16811.

It is an arithmetic number, because the mean of its divisors is an integer number (33501966).

Almost surely, 2^133980731 is an apocalyptic number.

133980731 is a deficient number, since it is larger than the sum of its proper divisors (27133).

133980731 is an equidigital number, since it uses as much as digits as its factorization.

133980731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27132.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 133980731 is about 11575.0045788328. The cubic root of 133980731 is about 511.6984651811.

The spelling of 133980731 in words is "one hundred thirty-three million, nine hundred eighty thousand, seven hundred thirty-one".