7640191 has 16 divisors (see below), whose sum is σ = 8805888. Its totient is φ = 6566400.

The previous prime is 7640183. The next prime is 7640219. The reversal of 7640191 is 1910467.

It is a cyclic number.

It is not a de Polignac number, because 7640191 - 2³ = 7640183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7640131) 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, 39906 + ... + 40096.

It is an arithmetic number, because the mean of its divisors is an integer number (550368).

Almost surely, 2^7640191 is an apocalyptic number.

7640191 is a deficient number, since it is larger than the sum of its proper divisors (1165697).

7640191 is a wasteful number, since it uses less digits than its factorization.

7640191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 7640191 is about 2764.0895426885. The cubic root of 7640191 is about 196.9554813641.

The spelling of 7640191 in words is "seven million, six hundred forty thousand, one hundred ninety-one".