133039947 has 4 divisors (see below), whose sum is σ = 177386600. Its totient is φ = 88693296.

The previous prime is 133039937. The next prime is 133039961. The reversal of 133039947 is 749930331.

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

It is not a de Polignac number, because 133039947 - 2¹¹ = 133037899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133039937) 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, 22173322 + ... + 22173327.

It is an arithmetic number, because the mean of its divisors is an integer number (44346650).

Almost surely, 2^133039947 is an apocalyptic number.

133039947 is a deficient number, since it is larger than the sum of its proper divisors (44346653).

133039947 is an equidigital number, since it uses as much as digits as its factorization.

133039947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44346652.

The product of its (nonzero) digits is 61236, while the sum is 39.

The square root of 133039947 is about 11534.2943867408. The cubic root of 133039947 is about 510.4979718995.

The spelling of 133039947 in words is "one hundred thirty-three million, thirty-nine thousand, nine hundred forty-seven".