7949409 has 16 divisors (see below), whose sum is σ = 11468352. Its totient is φ = 4868928.

The previous prime is 7949401. The next prime is 7949411. The reversal of 7949409 is 9049497.

It is not a de Polignac number, because 7949409 - 2³ = 7949401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7949401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12042 + ... + 12684.

It is an arithmetic number, because the mean of its divisors is an integer number (716772).

Almost surely, 2^7949409 is an apocalyptic number.

It is an amenable number.

7949409 is a deficient number, since it is larger than the sum of its proper divisors (3518943).

7949409 is a wasteful number, since it uses less digits than its factorization.

7949409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 7949409 is about 2819.4696309767. The cubic root of 7949409 is about 199.5775165002.

The spelling of 7949409 in words is "seven million, nine hundred forty-nine thousand, four hundred nine".