1939921201 has 2 divisors, whose sum is σ = 1939921202. Its totient is φ = 1939921200.

The previous prime is 1939921189. The next prime is 1939921231. The reversal of 1939921201 is 1021299391.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1003622400 + 936298801 = 31680^2 + 30599^2 .

It is a cyclic number.

It is not a de Polignac number, because 1939921201 - 2⁷ = 1939921073 is a prime.

It is not a weakly prime, because it can be changed into another prime (1939921231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 969960600 + 969960601.

It is an arithmetic number, because the mean of its divisors is an integer number (969960601).

Almost surely, 2^1939921201 is an apocalyptic number.

It is an amenable number.

1939921201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1939921201 is an equidigital number, since it uses as much as digits as its factorization.

1939921201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 37.

The square root of 1939921201 is about 44044.5365624387. The cubic root of 1939921201 is about 1247.1768180620.

The spelling of 1939921201 in words is "one billion, nine hundred thirty-nine million, nine hundred twenty-one thousand, two hundred one".