1416971821 has 2 divisors, whose sum is σ = 1416971822. Its totient is φ = 1416971820.

The previous prime is 1416971783. The next prime is 1416971827. The reversal of 1416971821 is 1281796141.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1399582921 + 17388900 = 37411^2 + 4170^2 .

It is a cyclic number.

It is not a de Polignac number, because 1416971821 - 2¹¹ = 1416969773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1416971827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 708485910 + 708485911.

It is an arithmetic number, because the mean of its divisors is an integer number (708485911).

Almost surely, 2^1416971821 is an apocalyptic number.

It is an amenable number.

1416971821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1416971821 is an equidigital number, since it uses as much as digits as its factorization.

1416971821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 40.

The square root of 1416971821 is about 37642.6861554805. The cubic root of 1416971821 is about 1123.1913181704.

The spelling of 1416971821 in words is "one billion, four hundred sixteen million, nine hundred seventy-one thousand, eight hundred twenty-one".