6291906439 has 32 divisors (see below), whose sum is σ = 8060613120. Its totient is φ = 4776734592.

The previous prime is 6291906433. The next prime is 6291906443. The reversal of 6291906439 is 9346091926.

It is not a de Polignac number, because 6291906439 - 2⁷ = 6291906311 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6291906392 and 6291906401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6291906433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 422844 + ... + 437470.

It is an arithmetic number, because the mean of its divisors is an integer number (251894160).

Almost surely, 2^6291906439 is an apocalyptic number.

6291906439 is a deficient number, since it is larger than the sum of its proper divisors (1768706681).

6291906439 is a wasteful number, since it uses less digits than its factorization.

6291906439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14839.

The product of its (nonzero) digits is 629856, while the sum is 49.

The square root of 6291906439 is about 79321.5383045488. The cubic root of 6291906439 is about 1846.1235058441.

The spelling of 6291906439 in words is "six billion, two hundred ninety-one million, nine hundred six thousand, four hundred thirty-nine".