1657460489 has 2 divisors, whose sum is σ = 1657460490. Its totient is φ = 1657460488.

The previous prime is 1657460411. The next prime is 1657460491. The reversal of 1657460489 is 9840647561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1657141264 + 319225 = 40708^2 + 565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1657460489 is a prime.

It is a super-2 number, since 2×1657460489² = 5494350545192238242, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1657460491, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1657460089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 828730244 + 828730245.

It is an arithmetic number, because the mean of its divisors is an integer number (828730245).

Almost surely, 2^1657460489 is an apocalyptic number.

It is an amenable number.

1657460489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1657460489 is an equidigital number, since it uses as much as digits as its factorization.

1657460489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 1657460489 is about 40711.9207235424. The cubic root of 1657460489 is about 1183.4440435377. Note that the first 3 decimals are identical.

The spelling of 1657460489 in words is "one billion, six hundred fifty-seven million, four hundred sixty thousand, four hundred eighty-nine".