308379247 has 16 divisors (see below), whose sum is σ = 340060032. Its totient is φ = 277325920.

The previous prime is 308379233. The next prime is 308379251. The reversal of 308379247 is 742973803.

It is not a de Polignac number, because 308379247 - 2¹⁹ = 307854959 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 (308379257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 660108 + ... + 660574.

It is an arithmetic number, because the mean of its divisors is an integer number (21253752).

Almost surely, 2^308379247 is an apocalyptic number.

308379247 is a deficient number, since it is larger than the sum of its proper divisors (31680785).

308379247 is a wasteful number, since it uses less digits than its factorization.

308379247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 308379247 is about 17560.7302524696. The cubic root of 308379247 is about 675.6084112974.

The spelling of 308379247 in words is "three hundred eight million, three hundred seventy-nine thousand, two hundred forty-seven".