390986471 has 4 divisors (see below), whose sum is σ = 391032912. Its totient is φ = 390940032.

The previous prime is 390986447. The next prime is 390986483. The reversal of 390986471 is 174689093.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 174689093 = 17 ⋅10275829.

It is a cyclic number.

It is not a de Polignac number, because 390986471 - 2¹⁰ = 390985447 is a prime.

It is a super-3 number, since 3×390986471³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390986411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6650 + ... + 28743.

It is an arithmetic number, because the mean of its divisors is an integer number (97758228).

Almost surely, 2^390986471 is an apocalyptic number.

390986471 is a deficient number, since it is larger than the sum of its proper divisors (46441).

390986471 is a wasteful number, since it uses less digits than its factorization.

390986471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46440.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 390986471 is about 19773.3778348566. The cubic root of 390986471 is about 731.2298471958.

The spelling of 390986471 in words is "three hundred ninety million, nine hundred eighty-six thousand, four hundred seventy-one".