7491493 has 2 divisors, whose sum is σ = 7491494. Its totient is φ = 7491492.

The previous prime is 7491469. The next prime is 7491551. The reversal of 7491493 is 3941947.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7491169 + 324 = 2737^2 + 18^2 .

It is a cyclic number.

It is not a de Polignac number, because 7491493 - 2⁹ = 7490981 is a prime.

It is a super-2 number, since 2×7491493² = 112244934738098, which contains 22 as substring.

It is a d-powerful number, because it can be written as 7 + 4⁸ + 9² + 1 + 4¹⁰ + 9⁷ + 3¹³ .

7491493 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7491403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3745746 + 3745747.

It is an arithmetic number, because the mean of its divisors is an integer number (3745747).

Almost surely, 2^7491493 is an apocalyptic number.

It is an amenable number.

7491493 is a deficient number, since it is larger than the sum of its proper divisors (1).

7491493 is an equidigital number, since it uses as much as digits as its factorization.

7491493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 37.

The square root of 7491493 is about 2737.0591882530. The cubic root of 7491493 is about 195.6693456612.

The spelling of 7491493 in words is "seven million, four hundred ninety-one thousand, four hundred ninety-three".