133431976309 has 2 divisors, whose sum is σ = 133431976310. Its totient is φ = 133431976308.

The previous prime is 133431976291. The next prime is 133431976319. The reversal of 133431976309 is 903679134331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122885302500 + 10546673809 = 350550^2 + 102697^2 .

It is an emirp because it is prime and its reverse (903679134331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133431976309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133431976319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66715988154 + 66715988155.

It is an arithmetic number, because the mean of its divisors is an integer number (66715988155).

Almost surely, 2^133431976309 is an apocalyptic number.

It is an amenable number.

133431976309 is a deficient number, since it is larger than the sum of its proper divisors (1).

133431976309 is an equidigital number, since it uses as much as digits as its factorization.

133431976309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1102248, while the sum is 49.

The spelling of 133431976309 in words is "one hundred thirty-three billion, four hundred thirty-one million, nine hundred seventy-six thousand, three hundred nine".