7649861 has 16 divisors (see below), whose sum is σ = 8273664. Its totient is φ = 7061184.

The previous prime is 7649849. The next prime is 7649867. The reversal of 7649861 is 1689467.

It is a cyclic number.

It is not a de Polignac number, because 7649861 - 2⁶ = 7649797 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 (7649867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92126 + ... + 92208.

It is an arithmetic number, because the mean of its divisors is an integer number (517104).

Almost surely, 2^7649861 is an apocalyptic number.

It is an amenable number.

7649861 is a deficient number, since it is larger than the sum of its proper divisors (623803).

7649861 is a wasteful number, since it uses less digits than its factorization.

7649861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220.

The product of its digits is 72576, while the sum is 41.

The square root of 7649861 is about 2765.8382092957. The cubic root of 7649861 is about 197.0385402192.

The spelling of 7649861 in words is "seven million, six hundred forty-nine thousand, eight hundred sixty-one".