6854179621 has 2 divisors, whose sum is σ = 6854179622. Its totient is φ = 6854179620.

The previous prime is 6854179559. The next prime is 6854179627. The reversal of 6854179621 is 1269714586.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6747801025 + 106378596 = 82145^2 + 10314^2 .

It is a cyclic number.

It is not a de Polignac number, because 6854179621 - 2⁹ = 6854179109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6854179627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3427089810 + 3427089811.

It is an arithmetic number, because the mean of its divisors is an integer number (3427089811).

Almost surely, 2^6854179621 is an apocalyptic number.

It is an amenable number.

6854179621 is a deficient number, since it is larger than the sum of its proper divisors (1).

6854179621 is an equidigital number, since it uses as much as digits as its factorization.

6854179621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 49.

The square root of 6854179621 is about 82789.9729496272. The cubic root of 6854179621 is about 1899.5548006772.

The spelling of 6854179621 in words is "six billion, eight hundred fifty-four million, one hundred seventy-nine thousand, six hundred twenty-one".