1678087797 has 8 divisors (see below), whose sum is σ = 2334730944. Its totient is φ = 1070084928.

The previous prime is 1678087783. The next prime is 1678087819. The reversal of 1678087797 is 7977808761.

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

It is not a de Polignac number, because 1678087797 - 2⁴ = 1678087781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1678087797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1678082797) 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, 12159988 + ... + 12160125.

It is an arithmetic number, because the mean of its divisors is an integer number (291841368).

Almost surely, 2^1678087797 is an apocalyptic number.

It is an amenable number.

1678087797 is a deficient number, since it is larger than the sum of its proper divisors (656643147).

1678087797 is a wasteful number, since it uses less digits than its factorization.

1678087797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24320139.

The product of its (nonzero) digits is 8297856, while the sum is 60.

The square root of 1678087797 is about 40964.4699343224. The cubic root of 1678087797 is about 1188.3331881544. Note that the first 3 decimals are identical.

The spelling of 1678087797 in words is "one billion, six hundred seventy-eight million, eighty-seven thousand, seven hundred ninety-seven".