308285141 has 2 divisors, whose sum is σ = 308285142. Its totient is φ = 308285140.

The previous prime is 308285119. The next prime is 308285143. The reversal of 308285141 is 141582803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 294808900 + 13476241 = 17170^2 + 3671^2 .

It is an emirp because it is prime and its reverse (141582803) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 308285141 - 2¹⁰ = 308284117 is a prime.

It is a super-2 number, since 2×308285141² = 190079456322779762, which contains 22 as substring.

Together with 308285143, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 308285098 and 308285107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (308285143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154142570 + 154142571.

It is an arithmetic number, because the mean of its divisors is an integer number (154142571).

Almost surely, 2^308285141 is an apocalyptic number.

It is an amenable number.

308285141 is a deficient number, since it is larger than the sum of its proper divisors (1).

308285141 is an equidigital number, since it uses as much as digits as its factorization.

308285141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 308285141 is about 17558.0506036405. The cubic root of 308285141 is about 675.5396806957.

The spelling of 308285141 in words is "three hundred eight million, two hundred eighty-five thousand, one hundred forty-one".