7940413 has 4 divisors (see below), whose sum is σ = 8551228. Its totient is φ = 7329600.

The previous prime is 7940399. The next prime is 7940417. The reversal of 7940413 is 3140497.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3140497 = 29 ⋅108293.

It can be written as a sum of positive squares in 2 ways, for example, as 5026564 + 2913849 = 2242^2 + 1707^2 .

It is a cyclic number.

It is not a de Polignac number, because 7940413 - 2⁵ = 7940381 is a prime.

It is a super-2 number, since 2×7940413² = 126100317221138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7940417) 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 in 3 ways as a sum of consecutive naturals, for example, 305388 + ... + 305413.

It is an arithmetic number, because the mean of its divisors is an integer number (2137807).

Almost surely, 2^7940413 is an apocalyptic number.

It is an amenable number.

7940413 is a deficient number, since it is larger than the sum of its proper divisors (610815).

7940413 is a wasteful number, since it uses less digits than its factorization.

7940413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610814.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 7940413 is about 2817.8738438759. The cubic root of 7940413 is about 199.5022036888.

The spelling of 7940413 in words is "seven million, nine hundred forty thousand, four hundred thirteen".