1657380253 has 4 divisors (see below), whose sum is σ = 1729440288. Its totient is φ = 1585320220.

The previous prime is 1657380233. The next prime is 1657380259. The reversal of 1657380253 is 3520837561.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3520837561 = 797 ⋅4417613.

It is a cyclic number.

It is not a de Polignac number, because 1657380253 - 2⁹ = 1657379741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1657380259) 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 3 ways as a sum of consecutive naturals, for example, 36029983 + ... + 36030028.

It is an arithmetic number, because the mean of its divisors is an integer number (432360072).

Almost surely, 2^1657380253 is an apocalyptic number.

It is an amenable number.

1657380253 is a deficient number, since it is larger than the sum of its proper divisors (72060035).

1657380253 is an equidigital number, since it uses as much as digits as its factorization.

1657380253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72060034.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 1657380253 is about 40710.9352999903. The cubic root of 1657380253 is about 1183.4249467831.

The spelling of 1657380253 in words is "one billion, six hundred fifty-seven million, three hundred eighty thousand, two hundred fifty-three".