307768133 has 2 divisors, whose sum is σ = 307768134. Its totient is φ = 307768132.

The previous prime is 307768081. The next prime is 307768147. The reversal of 307768133 is 331867703.

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., 285508609 + 22259524 = 16897^2 + 4718^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-307768133 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (307768193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153884066 + 153884067.

It is an arithmetic number, because the mean of its divisors is an integer number (153884067).

Almost surely, 2^307768133 is an apocalyptic number.

It is an amenable number.

307768133 is a deficient number, since it is larger than the sum of its proper divisors (1).

307768133 is an equidigital number, since it uses as much as digits as its factorization.

307768133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 307768133 is about 17543.3216068110. The cubic root of 307768133 is about 675.1618326192.

The spelling of 307768133 in words is "three hundred seven million, seven hundred sixty-eight thousand, one hundred thirty-three".