1976416021 has 2 divisors, whose sum is σ = 1976416022. Its totient is φ = 1976416020.

The previous prime is 1976416019. The next prime is 1976416063. The reversal of 1976416021 is 1206146791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1405875025 + 570540996 = 37495^2 + 23886^2 .

It is a cyclic number.

It is not a de Polignac number, because 1976416021 - 2¹ = 1976416019 is a prime.

Together with 1976416019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1976416121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 988208010 + 988208011.

It is an arithmetic number, because the mean of its divisors is an integer number (988208011).

Almost surely, 2^1976416021 is an apocalyptic number.

It is an amenable number.

1976416021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1976416021 is an equidigital number, since it uses as much as digits as its factorization.

1976416021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 1976416021 is about 44456.9007129377. The cubic root of 1976416021 is about 1254.9491301741.

The spelling of 1976416021 in words is "one billion, nine hundred seventy-six million, four hundred sixteen thousand, twenty-one".