308093 has 2 divisors, whose sum is σ = 308094. Its totient is φ = 308092.

The previous prime is 308081. The next prime is 308101. The reversal of 308093 is 390803.

Added to its reverse (390803) it gives a square (698896 = 836²).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 267289 + 40804 = 517^2 + 202^2 .

It is a cyclic number.

It is not a de Polignac number, because 308093 - 2¹² = 303997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (308003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154046 + 154047.

It is an arithmetic number, because the mean of its divisors is an integer number (154047).

2³⁰⁸⁰⁹³ is an apocalyptic number.

It is an amenable number.

308093 is a deficient number, since it is larger than the sum of its proper divisors (1).

308093 is an equidigital number, since it uses as much as digits as its factorization.

308093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 308093 is about 555.0612578806. The cubic root of 308093 is about 67.5399306490.

Adding to 308093 its reverse (390803), we get a palindrome (698896).

The spelling of 308093 in words is "three hundred eight thousand, ninety-three".