1659979803 has 16 divisors (see below), whose sum is σ = 2282594336. Its totient is φ = 1072258560.

The previous prime is 1659979781. The next prime is 1659979823. The reversal of 1659979803 is 3089799561.

It is not a de Polignac number, because 1659979803 - 2²¹ = 1657882651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1659979823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4276 + ... + 57777.

It is an arithmetic number, because the mean of its divisors is an integer number (142662146).

Almost surely, 2^1659979803 is an apocalyptic number.

1659979803 is a deficient number, since it is larger than the sum of its proper divisors (622614533).

1659979803 is a wasteful number, since it uses less digits than its factorization.

1659979803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62334.

The product of its (nonzero) digits is 3674160, while the sum is 57.

The square root of 1659979803 is about 40742.8497162386. The cubic root of 1659979803 is about 1184.0433454711.

The spelling of 1659979803 in words is "one billion, six hundred fifty-nine million, nine hundred seventy-nine thousand, eight hundred three".