8377532421 has 12 divisors (see below), whose sum is σ = 11788883712. Its totient is φ = 5291072424.

The previous prime is 8377532413. The next prime is 8377532461. The reversal of 8377532421 is 1242357738.

It is a happy number.

8377532421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8377532421 - 2³ = 8377532413 is a prime.

It is a super-2 number, since 2×8377532421² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8377532461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3866661 + ... + 3868826.

It is an arithmetic number, because the mean of its divisors is an integer number (982406976).

Almost surely, 2^8377532421 is an apocalyptic number.

It is an amenable number.

8377532421 is a deficient number, since it is larger than the sum of its proper divisors (3411351291).

8377532421 is a wasteful number, since it uses less digits than its factorization.

8377532421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7735528 (or 7735509 counting only the distinct ones).

The product of its digits is 282240, while the sum is 42.

The square root of 8377532421 is about 91528.8611368021. The cubic root of 8377532421 is about 2030.9787171515.

The spelling of 8377532421 in words is "eight billion, three hundred seventy-seven million, five hundred thirty-two thousand, four hundred twenty-one".