5678991 has 10 divisors (see below), whose sum is σ = 8483552. Its totient is φ = 3785940.

The previous prime is 5678989. The next prime is 5678993. The reversal of 5678991 is 1998765.

5678991 = T₈₃ + T₈₄ + ... + T₃₂₅.

5678991 is a `hidden beast` number, since 567 + 89 + 9 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (5678989) and next prime (5678993).

It is not a de Polignac number, because 5678991 - 2¹ = 5678989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5678993) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 34975 + ... + 35136.

Almost surely, 2^5678991 is an apocalyptic number.

5678991 is a deficient number, since it is larger than the sum of its proper divisors (2804561).

5678991 is an equidigital number, since it uses as much as digits as its factorization.

5678991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70123 (or 70114 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 5678991 is about 2383.0633646632. The cubic root of 5678991 is about 178.4118624265.

The spelling of 5678991 in words is "five million, six hundred seventy-eight thousand, nine hundred ninety-one".