133679731 has 4 divisors (see below), whose sum is σ = 135871264. Its totient is φ = 131488200.

The previous prime is 133679729. The next prime is 133679737. The reversal of 133679731 is 137976331.

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 133679731 - 2¹ = 133679729 is a prime.

It is a super-2 number, since 2×133679731² = 35740540960464722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133679737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1095675 + ... + 1095796.

It is an arithmetic number, because the mean of its divisors is an integer number (33967816).

Almost surely, 2^133679731 is an apocalyptic number.

133679731 is a deficient number, since it is larger than the sum of its proper divisors (2191533).

133679731 is an equidigital number, since it uses as much as digits as its factorization.

133679731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2191532.

The product of its digits is 71442, while the sum is 40.

The square root of 133679731 is about 11561.9951133012. The cubic root of 133679731 is about 511.3149853529.

The spelling of 133679731 in words is "one hundred thirty-three million, six hundred seventy-nine thousand, seven hundred thirty-one".