7681407 has 8 divisors (see below), whose sum is σ = 10371840. Its totient is φ = 5055960.

The previous prime is 7681403. The next prime is 7681409. The reversal of 7681407 is 7041867.

7681407 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7681407 - 2² = 7681403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7681403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15969 + ... + 16442.

It is an arithmetic number, because the mean of its divisors is an integer number (1296480).

Almost surely, 2^7681407 is an apocalyptic number.

7681407 is a deficient number, since it is larger than the sum of its proper divisors (2690433).

7681407 is a wasteful number, since it uses less digits than its factorization.

7681407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32493.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 7681407 is about 2771.5351341811. The cubic root of 7681407 is about 197.3090136843.

The spelling of 7681407 in words is "seven million, six hundred eighty-one thousand, four hundred seven".