391305013 has 8 divisors (see below), whose sum is σ = 428795136. Its totient is φ = 354134400.

The previous prime is 391304999. The next prime is 391305029. The reversal of 391305013 is 310503193.

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 391305013 - 2¹³ = 391296821 is a prime.

It is a super-2 number, since 2×391305013² = 306239226397860338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391305053) 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 7 ways as a sum of consecutive naturals, for example, 77308 + ... + 82213.

It is an arithmetic number, because the mean of its divisors is an integer number (53599392).

Almost surely, 2^391305013 is an apocalyptic number.

It is an amenable number.

391305013 is a deficient number, since it is larger than the sum of its proper divisors (37490123).

391305013 is a wasteful number, since it uses less digits than its factorization.

391305013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159755.

The product of its (nonzero) digits is 1215, while the sum is 25.

The square root of 391305013 is about 19781.4310149696. The cubic root of 391305013 is about 731.4283742613.

The spelling of 391305013 in words is "three hundred ninety-one million, three hundred five thousand, thirteen".