657613049 has 4 divisors (see below), whose sum is σ = 671604864. Its totient is φ = 643621236.

The previous prime is 657613037. The next prime is 657613093. The reversal of 657613049 is 940316756.

657613049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-657613049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 657612997 and 657613015.

It is not an unprimeable number, because it can be changed into a prime (657613249) 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, 6995837 + ... + 6995930.

It is an arithmetic number, because the mean of its divisors is an integer number (167901216).

Almost surely, 2^657613049 is an apocalyptic number.

It is an amenable number.

657613049 is a deficient number, since it is larger than the sum of its proper divisors (13991815).

657613049 is a wasteful number, since it uses less digits than its factorization.

657613049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13991814.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 657613049 is about 25643.9671072945. The cubic root of 657613049 is about 869.6078952671.

The spelling of 657613049 in words is "six hundred fifty-seven million, six hundred thirteen thousand, forty-nine".