1679663790 has 80 divisors (see below), whose sum is σ = 5161650912. Its totient is φ = 383921856.

The previous prime is 1679663761. The next prime is 1679663819. The reversal of 1679663790 is 973669761.

It is an interprime number because it is at equal distance from previous prime (1679663761) and next prime (1679663819).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 142449 + ... + 153788.

Almost surely, 2^1679663790 is an apocalyptic number.

1679663790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1679663790 is an abundant number, since it is smaller than the sum of its proper divisors (3481987122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1679663790 is a wasteful number, since it uses less digits than its factorization.

1679663790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296263 (or 296254 counting only the distinct ones).

The product of its (nonzero) digits is 2571912, while the sum is 54.

The square root of 1679663790 is about 40983.7015165785. The cubic root of 1679663790 is about 1188.7050834366.

The spelling of 1679663790 in words is "one billion, six hundred seventy-nine million, six hundred sixty-three thousand, seven hundred ninety".