5491951 has 2 divisors, whose sum is σ = 5491952. Its totient is φ = 5491950.

The previous prime is 5491943. The next prime is 5491957. The reversal of 5491951 is 1591945.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5491951 - 2³ = 5491943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5491957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2745975 + 2745976.

It is an arithmetic number, because the mean of its divisors is an integer number (2745976).

Almost surely, 2^5491951 is an apocalyptic number.

5491951 is a deficient number, since it is larger than the sum of its proper divisors (1).

5491951 is an equidigital number, since it uses as much as digits as its factorization.

5491951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8100, while the sum is 34.

The square root of 5491951 is about 2343.4911990447. The cubic root of 5491951 is about 176.4312663216.

It can be divided in two parts, 549 and 1951, that added together give a square (2500 = 50²).

The spelling of 5491951 in words is "five million, four hundred ninety-one thousand, nine hundred fifty-one".