7491791 has 2 divisors, whose sum is σ = 7491792. Its totient is φ = 7491790.

The previous prime is 7491779. The next prime is 7491811. The reversal of 7491791 is 1971947.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7491791 - 2⁶ = 7491727 is a prime.

It is a super-2 number, since 2×7491791² = 112253864775362, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7491091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3745895 + 3745896.

It is an arithmetic number, because the mean of its divisors is an integer number (3745896).

Almost surely, 2^7491791 is an apocalyptic number.

7491791 is a deficient number, since it is larger than the sum of its proper divisors (1).

7491791 is an equidigital number, since it uses as much as digits as its factorization.

7491791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15876, while the sum is 38.

The square root of 7491791 is about 2737.1136257014. The cubic root of 7491791 is about 195.6719401014.

The spelling of 7491791 in words is "seven million, four hundred ninety-one thousand, seven hundred ninety-one".