7948391 has 4 divisors (see below), whose sum is σ = 8670984. Its totient is φ = 7225800.

The previous prime is 7948373. The next prime is 7948393. The reversal of 7948391 is 1938497.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1938497 = 11 ⋅176227.

It is a cyclic number.

It is not a de Polignac number, because 7948391 - 2²² = 3754087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7948393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361280 + ... + 361301.

It is an arithmetic number, because the mean of its divisors is an integer number (2167746).

Almost surely, 2^7948391 is an apocalyptic number.

7948391 is a deficient number, since it is larger than the sum of its proper divisors (722593).

7948391 is a wasteful number, since it uses less digits than its factorization.

7948391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722592.

The product of its digits is 54432, while the sum is 41.

The square root of 7948391 is about 2819.2890947897. The cubic root of 7948391 is about 199.5689968486.

The spelling of 7948391 in words is "seven million, nine hundred forty-eight thousand, three hundred ninety-one".