308247149 has 4 divisors (see below), whose sum is σ = 352282464. Its totient is φ = 264211836.

The previous prime is 308247133. The next prime is 308247151. The reversal of 308247149 is 941742803.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 308247149 - 2⁴ = 308247133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308247109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22017647 + ... + 22017660.

It is an arithmetic number, because the mean of its divisors is an integer number (88070616).

Almost surely, 2^308247149 is an apocalyptic number.

It is an amenable number.

308247149 is a deficient number, since it is larger than the sum of its proper divisors (44035315).

308247149 is an equidigital number, since it uses as much as digits as its factorization.

308247149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44035314.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 308247149 is about 17556.9686734356. The cubic root of 308247149 is about 675.5119291604.

It can be divided in two parts, 30824 and 7149, that added together give a palindrome (37973).

The spelling of 308247149 in words is "three hundred eight million, two hundred forty-seven thousand, one hundred forty-nine".