5421621773 has 4 divisors (see below), whose sum is σ = 5423396028. Its totient is φ = 5419847520.

The previous prime is 5421621769. The next prime is 5421621787. The reversal of 5421621773 is 3771261245.

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 2310436489 + 3111185284 = 48067^2 + 55778^2 .

It is a cyclic number.

It is not a de Polignac number, because 5421621773 - 2² = 5421621769 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 (5421621703) 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, 882536 + ... + 888657.

It is an arithmetic number, because the mean of its divisors is an integer number (1355849007).

Almost surely, 2^5421621773 is an apocalyptic number.

It is an amenable number.

5421621773 is a deficient number, since it is larger than the sum of its proper divisors (1774255).

5421621773 is a wasteful number, since it uses less digits than its factorization.

5421621773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774254.

The product of its digits is 70560, while the sum is 38.

The square root of 5421621773 is about 73631.6628428287. The cubic root of 5421621773 is about 1756.7490967580.

The spelling of 5421621773 in words is "five billion, four hundred twenty-one million, six hundred twenty-one thousand, seven hundred seventy-three".