1979694403 has 4 divisors (see below), whose sum is σ = 1982100688. Its totient is φ = 1977288120.

The previous prime is 1979694397. The next prime is 1979694407. The reversal of 1979694403 is 3044969791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3044969791 = 13183 ⋅230977.

It is a cyclic number.

It is not a de Polignac number, because 1979694403 - 2¹⁷ = 1979563331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1979694407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1201908 + ... + 1203553.

It is an arithmetic number, because the mean of its divisors is an integer number (495525172).

Almost surely, 2^1979694403 is an apocalyptic number.

1979694403 is a deficient number, since it is larger than the sum of its proper divisors (2406285).

1979694403 is an equidigital number, since it uses as much as digits as its factorization.

1979694403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2406284.

The product of its (nonzero) digits is 1469664, while the sum is 52.

The square root of 1979694403 is about 44493.7568991426. The cubic root of 1979694403 is about 1255.6426295651.

The spelling of 1979694403 in words is "one billion, nine hundred seventy-nine million, six hundred ninety-four thousand, four hundred three".