133721172407 has 2 divisors, whose sum is σ = 133721172408. Its totient is φ = 133721172406.

The previous prime is 133721172373. The next prime is 133721172427. The reversal of 133721172407 is 704271127331.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133721172407 - 2¹⁰ = 133721171383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133721172427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66860586203 + 66860586204.

It is an arithmetic number, because the mean of its divisors is an integer number (66860586204).

Almost surely, 2^133721172407 is an apocalyptic number.

133721172407 is a deficient number, since it is larger than the sum of its proper divisors (1).

133721172407 is an equidigital number, since it uses as much as digits as its factorization.

133721172407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49392, while the sum is 38.

Adding to 133721172407 its reverse (704271127331), we get a palindrome (837992299738).

The spelling of 133721172407 in words is "one hundred thirty-three billion, seven hundred twenty-one million, one hundred seventy-two thousand, four hundred seven".