4891969 has 2 divisors, whose sum is σ = 4891970. Its totient is φ = 4891968.

The previous prime is 4891961. The next prime is 4891973. The reversal of 4891969 is 9691984.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4060225 + 831744 = 2015^2 + 912^2 .

It is a cyclic number.

It is not a de Polignac number, because 4891969 - 2³ = 4891961 is a prime.

It is a super-2 number, since 2×4891969² = 47862721393922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4891961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2445984 + 2445985.

It is an arithmetic number, because the mean of its divisors is an integer number (2445985).

Almost surely, 2^4891969 is an apocalyptic number.

It is an amenable number.

4891969 is a deficient number, since it is larger than the sum of its proper divisors (1).

4891969 is an equidigital number, since it uses as much as digits as its factorization.

4891969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 46.

The square root of 4891969 is about 2211.7796002315. The cubic root of 4891969 is about 169.7570809620.

The spelling of 4891969 in words is "four million, eight hundred ninety-one thousand, nine hundred sixty-nine".