306950381 has 2 divisors, whose sum is σ = 306950382. Its totient is φ = 306950380.

The previous prime is 306950363. The next prime is 306950429. The reversal of 306950381 is 183059603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197852356 + 109098025 = 14066^2 + 10445^2 .

It is an emirp because it is prime and its reverse (183059603) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-306950381 is a prime.

It is a super-2 number, since 2×306950381² = 188437072792090322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (306950311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153475190 + 153475191.

It is an arithmetic number, because the mean of its divisors is an integer number (153475191).

Almost surely, 2^306950381 is an apocalyptic number.

It is an amenable number.

306950381 is a deficient number, since it is larger than the sum of its proper divisors (1).

306950381 is an equidigital number, since it uses as much as digits as its factorization.

306950381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 306950381 is about 17519.9994577625. Note that the first 3 decimals coincide. The cubic root of 306950381 is about 674.5633250635.

The spelling of 306950381 in words is "three hundred six million, nine hundred fifty thousand, three hundred eighty-one".