421477519369 has 9 divisors (see below), whose sum is σ = 447740438677. Its totient is φ = 396674336704.

The previous prime is 421477519349. The next prime is 421477519373. The reversal of 421477519369 is 963915774124.

It is a happy number.

The square root of 421477519369 is 649213.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 13141183225 + 408336336144 = 114635^2 + 639012^2 .

It is not a de Polignac number, because 421477519369 - 2²¹ = 421475422217 is a prime.

It is a super-2 number, since 2×421477519369² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421477519339) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11017527 + ... + 11055715.

Almost surely, 2^421477519369 is an apocalyptic number.

421477519369 is the 649213-rd square number.

421477519369 is the 324607-th centered octagonal number.

It is an amenable number.

421477519369 is a deficient number, since it is larger than the sum of its proper divisors (26262919308).

421477519369 is an frugal number, since it uses more digits than its factorization.

421477519369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76412 (or 38206 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 58.

The spelling of 421477519369 in words is "four hundred twenty-one billion, four hundred seventy-seven million, five hundred nineteen thousand, three hundred sixty-nine".