307940513 has 2 divisors, whose sum is σ = 307940514. Its totient is φ = 307940512.

The previous prime is 307940471. The next prime is 307940527. The reversal of 307940513 is 315049703.

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., 222248464 + 85692049 = 14908^2 + 9257^2 .

It is a cyclic number.

It is not a de Polignac number, because 307940513 - 2¹² = 307936417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 307940513.

It is not a weakly prime, because it can be changed into another prime (307940573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153970256 + 153970257.

It is an arithmetic number, because the mean of its divisors is an integer number (153970257).

Almost surely, 2^307940513 is an apocalyptic number.

It is an amenable number.

307940513 is a deficient number, since it is larger than the sum of its proper divisors (1).

307940513 is an equidigital number, since it uses as much as digits as its factorization.

307940513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 307940513 is about 17548.2338997405. The cubic root of 307940513 is about 675.2878611259.

The spelling of 307940513 in words is "three hundred seven million, nine hundred forty thousand, five hundred thirteen".