8877421549 has 2 divisors, whose sum is σ = 8877421550. Its totient is φ = 8877421548.

The previous prime is 8877421541. The next prime is 8877421583. The reversal of 8877421549 is 9451247788.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4457565225 + 4419856324 = 66765^2 + 66482^2 .

It is a cyclic number.

It is not a de Polignac number, because 8877421549 - 2³ = 8877421541 is a prime.

It is a super-2 number, since 2×8877421549² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8877421549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8877421541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4438710774 + 4438710775.

It is an arithmetic number, because the mean of its divisors is an integer number (4438710775).

Almost surely, 2^8877421549 is an apocalyptic number.

It is an amenable number.

8877421549 is a deficient number, since it is larger than the sum of its proper divisors (1).

8877421549 is an equidigital number, since it uses as much as digits as its factorization.

8877421549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4515840, while the sum is 55.

The square root of 8877421549 is about 94220.0697781529. The cubic root of 8877421549 is about 2070.5971616831.

The spelling of 8877421549 in words is "eight billion, eight hundred seventy-seven million, four hundred twenty-one thousand, five hundred forty-nine".