391481007 has 32 divisors (see below), whose sum is σ = 543075840. Its totient is φ = 250736640.

The previous prime is 391480993. The next prime is 391481011. The reversal of 391481007 is 700184193.

It is not a de Polignac number, because 391481007 - 2¹⁰ = 391479983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391481017) 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 31 ways as a sum of consecutive naturals, for example, 2028303 + ... + 2028495.

It is an arithmetic number, because the mean of its divisors is an integer number (16971120).

Almost surely, 2^391481007 is an apocalyptic number.

391481007 is a deficient number, since it is larger than the sum of its proper divisors (151594833).

391481007 is a wasteful number, since it uses less digits than its factorization.

391481007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 391481007 is about 19785.8789797168. The cubic root of 391481007 is about 731.5380139772.

The spelling of 391481007 in words is "three hundred ninety-one million, four hundred eighty-one thousand, seven".