1982901601 has 2 divisors, whose sum is σ = 1982901602. Its totient is φ = 1982901600.

The previous prime is 1982901551. The next prime is 1982901631. The reversal of 1982901601 is 1061092891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1866240000 + 116661601 = 43200^2 + 10801^2 .

It is an emirp because it is prime and its reverse (1061092891) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1982901601 is a prime.

It is not a weakly prime, because it can be changed into another prime (1982901631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991450800 + 991450801.

It is an arithmetic number, because the mean of its divisors is an integer number (991450801).

Almost surely, 2^1982901601 is an apocalyptic number.

It is an amenable number.

1982901601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1982901601 is an equidigital number, since it uses as much as digits as its factorization.

1982901601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 37.

The square root of 1982901601 is about 44529.7833028637. The cubic root of 1982901601 is about 1256.3203304239.

The spelling of 1982901601 in words is "one billion, nine hundred eighty-two million, nine hundred one thousand, six hundred one".