307686149 has 2 divisors, whose sum is σ = 307686150. Its totient is φ = 307686148.

The previous prime is 307686131. The next prime is 307686151. The reversal of 307686149 is 941686703.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 276157924 + 31528225 = 16618^2 + 5615^2 .

It is a cyclic number.

It is not a de Polignac number, because 307686149 - 2⁸ = 307685893 is a prime.

Together with 307686151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (307686109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153843074 + 153843075.

It is an arithmetic number, because the mean of its divisors is an integer number (153843075).

Almost surely, 2^307686149 is an apocalyptic number.

It is an amenable number.

307686149 is a deficient number, since it is larger than the sum of its proper divisors (1).

307686149 is an equidigital number, since it uses as much as digits as its factorization.

307686149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 307686149 is about 17540.9848355216. The cubic root of 307686149 is about 675.1018768956.

The spelling of 307686149 in words is "three hundred seven million, six hundred eighty-six thousand, one hundred forty-nine".