1657874089 has 9 divisors (see below), whose sum is σ = 1750539933. Its totient is φ = 1569884652.

The previous prime is 1657874087. The next prime is 1657874093. The reversal of 1657874089 is 9804787561.

The square root of 1657874089 is 40717.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1657874089 - 2¹ = 1657874087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1657874081) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 772552 + ... + 774694.

It is an arithmetic number, because the mean of its divisors is an integer number (194504437).

Almost surely, 2^1657874089 is an apocalyptic number.

1657874089 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1657874089 is the 40717-th square number.

1657874089 is the 20359-th centered octagonal number.

It is an amenable number.

1657874089 is a deficient number, since it is larger than the sum of its proper divisors (92665844).

1657874089 is an frugal number, since it uses more digits than its factorization.

1657874089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4324 (or 2162 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 55.

The cubic root of 1657874089 is about 1183.5424735860.

The spelling of 1657874089 in words is "one billion, six hundred fifty-seven million, eight hundred seventy-four thousand, eighty-nine".