1657898453 has 4 divisors (see below), whose sum is σ = 1669825920. Its totient is φ = 1645970988.

The previous prime is 1657898413. The next prime is 1657898533. The reversal of 1657898453 is 3548987561.

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 not a de Polignac number, because 1657898453 - 2²⁰ = 1656849877 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 (1657898413) 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, 5963525 + ... + 5963802.

It is an arithmetic number, because the mean of its divisors is an integer number (417456480).

Almost surely, 2^1657898453 is an apocalyptic number.

It is an amenable number.

1657898453 is a deficient number, since it is larger than the sum of its proper divisors (11927467).

1657898453 is a wasteful number, since it uses less digits than its factorization.

1657898453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11927466.

The product of its digits is 7257600, while the sum is 56.

The square root of 1657898453 is about 40717.2991859725. The cubic root of 1657898453 is about 1183.5482713097.

The spelling of 1657898453 in words is "one billion, six hundred fifty-seven million, eight hundred ninety-eight thousand, four hundred fifty-three".