7423891 has 2 divisors, whose sum is σ = 7423892. Its totient is φ = 7423890.

The previous prime is 7423879. The next prime is 7423903. The reversal of 7423891 is 1983247.

It is a balanced prime because it is at equal distance from previous prime (7423879) and next prime (7423903).

It is a cyclic number.

It is not a de Polignac number, because 7423891 - 2⁵ = 7423859 is a prime.

It is a super-2 number, since 2×7423891² = 110228315159762, which contains 22 as substring.

7423891 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (7423841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3711945 + 3711946.

It is an arithmetic number, because the mean of its divisors is an integer number (3711946).

Almost surely, 2^7423891 is an apocalyptic number.

7423891 is a deficient number, since it is larger than the sum of its proper divisors (1).

7423891 is an equidigital number, since it uses as much as digits as its factorization.

7423891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The square root of 7423891 is about 2724.6818162861. The cubic root of 7423891 is about 195.0790037097.

The spelling of 7423891 in words is "seven million, four hundred twenty-three thousand, eight hundred ninety-one".