1679949533 has 4 divisors (see below), whose sum is σ = 1711646748. Its totient is φ = 1648252320.

The previous prime is 1679949451. The next prime is 1679949553. The reversal of 1679949533 is 3359499761.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 723717604 + 956231929 = 26902^2 + 30923^2 .

It is a cyclic number.

It is not a de Polignac number, because 1679949533 - 2¹⁸ = 1679687389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1679949553) 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, 15848528 + ... + 15848633.

It is an arithmetic number, because the mean of its divisors is an integer number (427911687).

Almost surely, 2^1679949533 is an apocalyptic number.

It is an amenable number.

1679949533 is a deficient number, since it is larger than the sum of its proper divisors (31697215).

1679949533 is an equidigital number, since it uses as much as digits as its factorization.

1679949533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31697214.

The product of its digits is 5511240, while the sum is 56.

The square root of 1679949533 is about 40987.1874248527. The cubic root of 1679949533 is about 1188.7724867862.

The spelling of 1679949533 in words is "one billion, six hundred seventy-nine million, nine hundred forty-nine thousand, five hundred thirty-three".