7640497 has 4 divisors (see below), whose sum is σ = 8089956. Its totient is φ = 7191040.

The previous prime is 7640483. The next prime is 7640519. The reversal of 7640497 is 7940467.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3013696 + 4626801 = 1736^2 + 2151^2 .

It is a cyclic number.

It is not a de Polignac number, because 7640497 - 2¹⁵ = 7607729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7646497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224704 + ... + 224737.

It is an arithmetic number, because the mean of its divisors is an integer number (2022489).

Almost surely, 2^7640497 is an apocalyptic number.

It is an amenable number.

7640497 is a deficient number, since it is larger than the sum of its proper divisors (449459).

7640497 is a wasteful number, since it uses less digits than its factorization.

7640497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449458.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 7640497 is about 2764.1448948997. The cubic root of 7640497 is about 196.9581107736.

The spelling of 7640497 in words is "seven million, six hundred forty thousand, four hundred ninety-seven".