471721986 has 24 divisors (see below), whose sum is σ = 1043812224. Its totient is φ = 153894840.

The previous prime is 471721981. The next prime is 471721993. The reversal of 471721986 is 689127174.

It is a happy number.

It is a super-3 number, since 3×471721986³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (471721981) 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, 277950 + ... + 279641.

It is an arithmetic number, because the mean of its divisors is an integer number (43492176).

Almost surely, 2^471721986 is an apocalyptic number.

471721986 is an abundant number, since it is smaller than the sum of its proper divisors (572090238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

471721986 is a wasteful number, since it uses less digits than its factorization.

471721986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557646 (or 557643 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 471721986 is about 21719.1617241550. The cubic root of 471721986 is about 778.4463848593.

The spelling of 471721986 in words is "four hundred seventy-one million, seven hundred twenty-one thousand, nine hundred eighty-six".