1979014621 has 4 divisors (see below), whose sum is σ = 1984685500. Its totient is φ = 1973343744.

The previous prime is 1979014529. The next prime is 1979014633. The reversal of 1979014621 is 1264109791.

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 947962521 + 1031052100 = 30789^2 + 32110^2 .

It is a cyclic number.

It is not a de Polignac number, because 1979014621 - 2¹¹ = 1979012573 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 (1979014651) 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, 2834916 + ... + 2835613.

It is an arithmetic number, because the mean of its divisors is an integer number (496171375).

Almost surely, 2^1979014621 is an apocalyptic number.

It is an amenable number.

1979014621 is a deficient number, since it is larger than the sum of its proper divisors (5670879).

1979014621 is an equidigital number, since it uses as much as digits as its factorization.

1979014621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5670878.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 1979014621 is about 44486.1171715402. The cubic root of 1979014621 is about 1255.4988934117.

The spelling of 1979014621 in words is "one billion, nine hundred seventy-nine million, fourteen thousand, six hundred twenty-one".