653677493 has 6 divisors (see below), whose sum is σ = 760400406. Its totient is φ = 560294952.

The previous prime is 653677481. The next prime is 653677511. The reversal of 653677493 is 394776356.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 415222129 + 238455364 = 20377^2 + 15442^2 .

It is not a de Polignac number, because 653677493 - 2⁸ = 653677237 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 (653677793) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6670130 + ... + 6670227.

It is an arithmetic number, because the mean of its divisors is an integer number (126733401).

Almost surely, 2^653677493 is an apocalyptic number.

It is an amenable number.

653677493 is a deficient number, since it is larger than the sum of its proper divisors (106722913).

653677493 is a wasteful number, since it uses less digits than its factorization.

653677493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13340371 (or 13340364 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 50.

The square root of 653677493 is about 25567.1174167132. The cubic root of 653677493 is about 867.8696691240.

The spelling of 653677493 in words is "six hundred fifty-three million, six hundred seventy-seven thousand, four hundred ninety-three".