1679425402 has 4 divisors (see below), whose sum is σ = 2519138106. Its totient is φ = 839712700.

The previous prime is 1679425381. The next prime is 1679425441. The reversal of 1679425402 is 2045249761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2045249761 = 6581 ⋅310781.

It can be written as a sum of positive squares in only one way, i.e., 1069878681 + 609546721 = 32709^2 + 24689^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419856349 + ... + 419856352.

Almost surely, 2^1679425402 is an apocalyptic number.

1679425402 is a deficient number, since it is larger than the sum of its proper divisors (839712704).

1679425402 is an equidigital number, since it uses as much as digits as its factorization.

1679425402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839712703.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 1679425402 is about 40980.7930865180. The cubic root of 1679425402 is about 1188.6488447146.

The spelling of 1679425402 in words is "one billion, six hundred seventy-nine million, four hundred twenty-five thousand, four hundred two".