33145209997 has 2 divisors, whose sum is σ = 33145209998. Its totient is φ = 33145209996.

The previous prime is 33145209989. The next prime is 33145210027. The reversal of 33145209997 is 79990254133.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32966212356 + 178997641 = 181566^2 + 13379^2 .

It is a cyclic number.

It is not a de Polignac number, because 33145209997 - 2³ = 33145209989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33145209197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16572604998 + 16572604999.

It is an arithmetic number, because the mean of its divisors is an integer number (16572604999).

Almost surely, 2^33145209997 is an apocalyptic number.

It is an amenable number.

33145209997 is a deficient number, since it is larger than the sum of its proper divisors (1).

33145209997 is an equidigital number, since it uses as much as digits as its factorization.

33145209997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1837080, while the sum is 52.

The spelling of 33145209997 in words is "thirty-three billion, one hundred forty-five million, two hundred nine thousand, nine hundred ninety-seven".