671421311 has 16 divisors (see below), whose sum is σ = 759507840. Its totient is φ = 587942880.

The previous prime is 671421299. The next prime is 671421319. The reversal of 671421311 is 113124176.

It is a cyclic number.

It is not a de Polignac number, because 671421311 - 2²² = 667227007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671421319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146720 + ... + 151226.

It is an arithmetic number, because the mean of its divisors is an integer number (47469240).

Almost surely, 2^671421311 is an apocalyptic number.

671421311 is a deficient number, since it is larger than the sum of its proper divisors (88086529).

671421311 is a wasteful number, since it uses less digits than its factorization.

671421311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5014.

The product of its digits is 1008, while the sum is 26.

The square root of 671421311 is about 25911.7986832254. The cubic root of 671421311 is about 875.6523292287.

Adding to 671421311 its reverse (113124176), we get a palindrome (784545487).

The spelling of 671421311 in words is "six hundred seventy-one million, four hundred twenty-one thousand, three hundred eleven".