1677690653 has 4 divisors (see below), whose sum is σ = 1702730880. Its totient is φ = 1652650428.

The previous prime is 1677690649. The next prime is 1677690661. The reversal of 1677690653 is 3560967761.

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 1677690653 - 2² = 1677690649 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 (1677690683) 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, 12520013 + ... + 12520146.

It is an arithmetic number, because the mean of its divisors is an integer number (425682720).

Almost surely, 2^1677690653 is an apocalyptic number.

It is an amenable number.

1677690653 is a deficient number, since it is larger than the sum of its proper divisors (25040227).

1677690653 is an equidigital number, since it uses as much as digits as its factorization.

1677690653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25040226.

The product of its (nonzero) digits is 1428840, while the sum is 50.

The square root of 1677690653 is about 40959.6222272618. The cubic root of 1677690653 is about 1188.2394352865.

The spelling of 1677690653 in words is "one billion, six hundred seventy-seven million, six hundred ninety thousand, six hundred fifty-three".