1678595949 has 18 divisors (see below), whose sum is σ = 2438678606. Its totient is φ = 1112621040.

The previous prime is 1678595911. The next prime is 1678595993. The reversal of 1678595949 is 9495958761.

It can be written as a sum of positive squares in only one way, i.e., 1622075625 + 56520324 = 40275^2 + 7518^2 .

It is not a de Polignac number, because 1678595949 - 2⁸ = 1678595693 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 (1678095949) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 285459 + ... + 291279.

Almost surely, 2^1678595949 is an apocalyptic number.

It is an amenable number.

1678595949 is a deficient number, since it is larger than the sum of its proper divisors (760082657).

1678595949 is an equidigital number, since it uses as much as digits as its factorization.

1678595949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6185 (or 6003 counting only the distinct ones).

The product of its digits is 24494400, while the sum is 63.

The square root of 1678595949 is about 40970.6718153364. The cubic root of 1678595949 is about 1188.4531248557.

The spelling of 1678595949 in words is "one billion, six hundred seventy-eight million, five hundred ninety-five thousand, nine hundred forty-nine".