1641722371 has 2 divisors, whose sum is σ = 1641722372. Its totient is φ = 1641722370.

The previous prime is 1641722363. The next prime is 1641722399. The reversal of 1641722371 is 1732271461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1641722371 - 2³ = 1641722363 is a prime.

It is not a weakly prime, because it can be changed into another prime (1641722311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820861185 + 820861186.

It is an arithmetic number, because the mean of its divisors is an integer number (820861186).

Almost surely, 2^1641722371 is an apocalyptic number.

1641722371 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641722371 is an equidigital number, since it uses as much as digits as its factorization.

1641722371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 34.

The square root of 1641722371 is about 40518.1733423411. The cubic root of 1641722371 is about 1179.6863982778.

The spelling of 1641722371 in words is "one billion, six hundred forty-one million, seven hundred twenty-two thousand, three hundred seventy-one".