391348990281 has 16 divisors (see below), whose sum is σ = 532014560000. Its totient is φ = 255840726528.

The previous prime is 391348990231. The next prime is 391348990283. The reversal of 391348990281 is 182099843193.

It is not a de Polignac number, because 391348990281 - 2³⁰ = 390275248457 is a prime.

It is a super-2 number, since 2×391348990281² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391348990283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6137281 + ... + 6200718.

It is an arithmetic number, because the mean of its divisors is an integer number (33250910000).

Almost surely, 2^391348990281 is an apocalyptic number.

It is an amenable number.

391348990281 is a deficient number, since it is larger than the sum of its proper divisors (140665569719).

391348990281 is a wasteful number, since it uses less digits than its factorization.

391348990281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12338208.

The product of its (nonzero) digits is 3359232, while the sum is 57.

The spelling of 391348990281 in words is "three hundred ninety-one billion, three hundred forty-eight million, nine hundred ninety thousand, two hundred eighty-one".