655340497 has 16 divisors (see below), whose sum is σ = 794741760. Its totient is φ = 527528448.

The previous prime is 655340473. The next prime is 655340503. The reversal of 655340497 is 794043556.

It is not a de Polignac number, because 655340497 - 2²⁷ = 521122769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655340407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51253 + ... + 62749.

It is an arithmetic number, because the mean of its divisors is an integer number (49671360).

Almost surely, 2^655340497 is an apocalyptic number.

It is an amenable number.

655340497 is a deficient number, since it is larger than the sum of its proper divisors (139401263).

655340497 is a wasteful number, since it uses less digits than its factorization.

655340497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12000.

The product of its (nonzero) digits is 453600, while the sum is 43.

The square root of 655340497 is about 25599.6190791973. The cubic root of 655340497 is about 868.6050208045.

The spelling of 655340497 in words is "six hundred fifty-five million, three hundred forty thousand, four hundred ninety-seven".