4376461721 has 2 divisors, whose sum is σ = 4376461722. Its totient is φ = 4376461720.

The previous prime is 4376461699. The next prime is 4376461723. The reversal of 4376461721 is 1271646734.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4357452121 + 19009600 = 66011^2 + 4360^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4376461721 is a prime.

Together with 4376461723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4376461723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2188230860 + 2188230861.

It is an arithmetic number, because the mean of its divisors is an integer number (2188230861).

Almost surely, 2^4376461721 is an apocalyptic number.

It is an amenable number.

4376461721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4376461721 is an equidigital number, since it uses as much as digits as its factorization.

4376461721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 41.

The square root of 4376461721 is about 66154.8314259813. The cubic root of 4376461721 is about 1635.7152828626.

The spelling of 4376461721 in words is "four billion, three hundred seventy-six million, four hundred sixty-one thousand, seven hundred twenty-one".