308247997 has 8 divisors (see below), whose sum is σ = 311785344. Its totient is φ = 304721328.

The previous prime is 308247983. The next prime is 308248007. The reversal of 308247997 is 799742803.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 308247997 - 2⁷ = 308247869 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 308247997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308247977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64968 + ... + 69550.

It is an arithmetic number, because the mean of its divisors is an integer number (38973168).

Almost surely, 2^308247997 is an apocalyptic number.

It is an amenable number.

308247997 is a deficient number, since it is larger than the sum of its proper divisors (3537347).

308247997 is a wasteful number, since it uses less digits than its factorization.

308247997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5339.

The product of its (nonzero) digits is 762048, while the sum is 49.

The square root of 308247997 is about 17556.9928233738. The cubic root of 308247997 is about 675.5125486131.

The spelling of 308247997 in words is "three hundred eight million, two hundred forty-seven thousand, nine hundred ninety-seven".