307640699 has 2 divisors, whose sum is σ = 307640700. Its totient is φ = 307640698.

The previous prime is 307640689. The next prime is 307640713. The reversal of 307640699 is 996046703.

It is a weak prime.

It is an emirp because it is prime and its reverse (996046703) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-307640699 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (307640639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153820349 + 153820350.

It is an arithmetic number, because the mean of its divisors is an integer number (153820350).

Almost surely, 2^307640699 is an apocalyptic number.

307640699 is a deficient number, since it is larger than the sum of its proper divisors (1).

307640699 is an equidigital number, since it uses as much as digits as its factorization.

307640699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 44.

The square root of 307640699 is about 17539.6892503830. The cubic root of 307640699 is about 675.0686342647.

The spelling of 307640699 in words is "three hundred seven million, six hundred forty thousand, six hundred ninety-nine".