8574836621 has 4 divisors (see below), whose sum is σ = 9234439452. Its totient is φ = 7915233792.

The previous prime is 8574836593. The next prime is 8574836639. The reversal of 8574836621 is 1266384758.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1266384758 = 2 ⋅633192379.

It can be written as a sum of positive squares in 2 ways, for example, as 391644100 + 8183192521 = 19790^2 + 90461^2 .

It is a cyclic number.

It is not a de Polignac number, because 8574836621 - 2²² = 8570642317 is a prime.

It is a super-3 number, since 3×8574836621³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8574836621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8574136621) 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, 329801396 + ... + 329801421.

It is an arithmetic number, because the mean of its divisors is an integer number (2308609863).

Almost surely, 2^8574836621 is an apocalyptic number.

It is an amenable number.

8574836621 is a deficient number, since it is larger than the sum of its proper divisors (659602831).

8574836621 is a wasteful number, since it uses less digits than its factorization.

8574836621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659602830.

The product of its digits is 1935360, while the sum is 50.

The square root of 8574836621 is about 92600.4137193782. The cubic root of 8574836621 is about 2046.7994173986.

The spelling of 8574836621 in words is "eight billion, five hundred seventy-four million, eight hundred thirty-six thousand, six hundred twenty-one".