1682978957 has 8 divisors (see below), whose sum is σ = 1851151872. Its totient is φ = 1529979660.

The previous prime is 1682978939. The next prime is 1682978987. The reversal of 1682978957 is 7598792861.

It is not a de Polignac number, because 1682978957 - 2⁶ = 1682978893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1682978957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1682978917) 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, 630893 + ... + 633554.

It is an arithmetic number, because the mean of its divisors is an integer number (231393984).

Almost surely, 2^1682978957 is an apocalyptic number.

It is an amenable number.

1682978957 is a deficient number, since it is larger than the sum of its proper divisors (168172915).

1682978957 is an equidigital number, since it uses as much as digits as its factorization.

1682978957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264480 (or 1264458 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 62.

The square root of 1682978957 is about 41024.1265233033. The cubic root of 1682978957 is about 1189.4866219987.

The spelling of 1682978957 in words is "one billion, six hundred eighty-two million, nine hundred seventy-eight thousand, nine hundred fifty-seven".