1699201980 has 72 divisors (see below), whose sum is σ = 5890571232. Its totient is φ = 388388736.

The previous prime is 1699201963. The next prime is 1699201997. The reversal of 1699201980 is 891029961.

It is an interprime number because it is at equal distance from previous prime (1699201963) and next prime (1699201997).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 673027 + ... + 675546.

Almost surely, 2^1699201980 is an apocalyptic number.

1699201980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1699201980 is an abundant number, since it is smaller than the sum of its proper divisors (4191369252).

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

1699201980 is a wasteful number, since it uses less digits than its factorization.

1699201980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348595 (or 1348590 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 45.

The square root of 1699201980 is about 41221.3777062339. The cubic root of 1699201980 is about 1193.2964130007.

The spelling of 1699201980 in words is "one billion, six hundred ninety-nine million, two hundred one thousand, nine hundred eighty".