1671114721 has 4 divisors (see below), whose sum is σ = 1671288112. Its totient is φ = 1670941332.

The previous prime is 1671114713. The next prime is 1671114743. The reversal of 1671114721 is 1274111761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1671114721 - 2³ = 1671114713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1671114701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71331 + ... + 91816.

It is an arithmetic number, because the mean of its divisors is an integer number (417822028).

Almost surely, 2^1671114721 is an apocalyptic number.

It is an amenable number.

1671114721 is a deficient number, since it is larger than the sum of its proper divisors (173391).

1671114721 is a wasteful number, since it uses less digits than its factorization.

1671114721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173390.

The product of its digits is 2352, while the sum is 31.

The square root of 1671114721 is about 40879.2700644226. The cubic root of 1671114721 is about 1186.6849148799.

The spelling of 1671114721 in words is "one billion, six hundred seventy-one million, one hundred fourteen thousand, seven hundred twenty-one".