308481913 has 8 divisors (see below), whose sum is σ = 322191360. Its totient is φ = 295055280.

The previous prime is 308481907. The next prime is 308481919. The reversal of 308481913 is 319184803.

It is an interprime number because it is at equal distance from previous prime (308481907) and next prime (308481919).

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 308481913 - 2⁹ = 308481401 is a prime.

It is a super-2 number, since 2×308481913² = 190322181296279138, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (308481919) 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, 68473 + ... + 72838.

It is an arithmetic number, because the mean of its divisors is an integer number (40273920).

Almost surely, 2^308481913 is an apocalyptic number.

It is an amenable number.

308481913 is a deficient number, since it is larger than the sum of its proper divisors (13709447).

308481913 is a wasteful number, since it uses less digits than its factorization.

308481913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141407.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 308481913 is about 17563.6531792221. The cubic root of 308481913 is about 675.6833777744.

It can be divided in two parts, 30848 and 1913, that added together give a square (32761 = 181²).

The spelling of 308481913 in words is "three hundred eight million, four hundred eighty-one thousand, nine hundred thirteen".