1998939301 has 2 divisors, whose sum is σ = 1998939302. Its totient is φ = 1998939300.

The previous prime is 1998939287. The next prime is 1998939331. The reversal of 1998939301 is 1039398991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1831754401 + 167184900 = 42799^2 + 12930^2 .

It is a cyclic number.

It is not a de Polignac number, because 1998939301 - 2²¹ = 1996842149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1998939331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999469650 + 999469651.

It is an arithmetic number, because the mean of its divisors is an integer number (999469651).

Almost surely, 2^1998939301 is an apocalyptic number.

It is an amenable number.

1998939301 is a deficient number, since it is larger than the sum of its proper divisors (1).

1998939301 is an equidigital number, since it uses as much as digits as its factorization.

1998939301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 472392, while the sum is 52.

The square root of 1998939301 is about 44709.4990018900. The cubic root of 1998939301 is about 1259.6982776749.

The spelling of 1998939301 in words is "one billion, nine hundred ninety-eight million, nine hundred thirty-nine thousand, three hundred one".