391411487 has 8 divisors (see below), whose sum is σ = 410887680. Its totient is φ = 372363480.

The previous prime is 391411481. The next prime is 391411507. The reversal of 391411487 is 784114193.

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 391411487 - 2²⁶ = 324302623 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 391411487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391411481) 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, 105173 + ... + 108830.

It is an arithmetic number, because the mean of its divisors is an integer number (51360960).

Almost surely, 2^391411487 is an apocalyptic number.

391411487 is a deficient number, since it is larger than the sum of its proper divisors (19476193).

391411487 is a wasteful number, since it uses less digits than its factorization.

391411487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214093.

The product of its digits is 24192, while the sum is 38.

The square root of 391411487 is about 19784.1220932343. The cubic root of 391411487 is about 731.4947087401.

The spelling of 391411487 in words is "three hundred ninety-one million, four hundred eleven thousand, four hundred eighty-seven".