671801403 has 64 divisors (see below), whose sum is σ = 1147338752. Its totient is φ = 340122240.

The previous prime is 671801381. The next prime is 671801413. The reversal of 671801403 is 304108176.

It is a happy number.

It is not a de Polignac number, because 671801403 - 2⁵ = 671801371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (671801413) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1379226 + ... + 1379712.

It is an arithmetic number, because the mean of its divisors is an integer number (17927168).

Almost surely, 2^671801403 is an apocalyptic number.

671801403 is a deficient number, since it is larger than the sum of its proper divisors (475537349).

671801403 is a wasteful number, since it uses less digits than its factorization.

671801403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 671801403 is about 25919.1319877808. The cubic root of 671801403 is about 875.8175338251.

Adding to 671801403 its reverse (304108176), we get a palindrome (975909579).

The spelling of 671801403 in words is "six hundred seventy-one million, eight hundred one thousand, four hundred three".