5979991 has 2 divisors, whose sum is σ = 5979992. Its totient is φ = 5979990.

The previous prime is 5979983. The next prime is 5980021. The reversal of 5979991 is 1999795.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5979991 - 2³ = 5979983 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5973991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2989995 + 2989996.

It is an arithmetic number, because the mean of its divisors is an integer number (2989996).

Almost surely, 2^5979991 is an apocalyptic number.

5979991 is a deficient number, since it is larger than the sum of its proper divisors (1).

5979991 is an equidigital number, since it uses as much as digits as its factorization.

5979991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 229635, while the sum is 49.

The square root of 5979991 is about 2445.4020119400. The cubic root of 5979991 is about 181.5098411843.

The spelling of 5979991 in words is "five million, nine hundred seventy-nine thousand, nine hundred ninety-one".