5491979 has 2 divisors, whose sum is σ = 5491980. Its totient is φ = 5491978.

The previous prime is 5491973. The next prime is 5491999. The reversal of 5491979 is 9791945.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5491979 - 2⁸ = 5491723 is a prime.

It is not a weakly prime, because it can be changed into another prime (5491973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2745989 + 2745990.

It is an arithmetic number, because the mean of its divisors is an integer number (2745990).

Almost surely, 2^5491979 is an apocalyptic number.

5491979 is a deficient number, since it is larger than the sum of its proper divisors (1).

5491979 is an equidigital number, since it uses as much as digits as its factorization.

5491979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102060, while the sum is 44.

The square root of 5491979 is about 2343.4971730301. The cubic root of 5491979 is about 176.4315661584.

The spelling of 5491979 in words is "five million, four hundred ninety-one thousand, nine hundred seventy-nine".