1677940809 has 8 divisors (see below), whose sum is σ = 2249753760. Its totient is φ = 1112377536.

The previous prime is 1677940769. The next prime is 1677940819. The reversal of 1677940809 is 9080497761.

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

It is not a de Polignac number, because 1677940809 - 2²⁵ = 1644386377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1677940819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1561792 + ... + 1562865.

It is an arithmetic number, because the mean of its divisors is an integer number (281219220).

Almost surely, 2^1677940809 is an apocalyptic number.

It is an amenable number.

1677940809 is a deficient number, since it is larger than the sum of its proper divisors (571812951).

1677940809 is a wasteful number, since it uses less digits than its factorization.

1677940809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3124839.

The product of its (nonzero) digits is 762048, while the sum is 51.

The square root of 1677940809 is about 40962.6758037118. The cubic root of 1677940809 is about 1188.2984907607.

The spelling of 1677940809 in words is "one billion, six hundred seventy-seven million, nine hundred forty thousand, eight hundred nine".