1657117253 has 8 divisors (see below), whose sum is σ = 1811850336. Its totient is φ = 1503065200.

The previous prime is 1657117249. The next prime is 1657117283. The reversal of 1657117253 is 3527117561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1657117253 - 2² = 1657117249 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 (1657117223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165158 + ... + 174903.

It is an arithmetic number, because the mean of its divisors is an integer number (226481292).

Almost surely, 2^1657117253 is an apocalyptic number.

It is an amenable number.

1657117253 is a deficient number, since it is larger than the sum of its proper divisors (154733083).

1657117253 is a wasteful number, since it uses less digits than its factorization.

1657117253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340515.

The product of its digits is 44100, while the sum is 38.

The square root of 1657117253 is about 40707.7050814708. The cubic root of 1657117253 is about 1183.3623465390.

The spelling of 1657117253 in words is "one billion, six hundred fifty-seven million, one hundred seventeen thousand, two hundred fifty-three".