1975891201 has 2 divisors, whose sum is σ = 1975891202. Its totient is φ = 1975891200.

The previous prime is 1975891189. The next prime is 1975891223. The reversal of 1975891201 is 1021985791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1664721601 + 311169600 = 40801^2 + 17640^2 .

It is a cyclic number.

It is not a de Polignac number, because 1975891201 - 2²¹ = 1973794049 is a prime.

It is not a weakly prime, because it can be changed into another prime (1975891901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987945600 + 987945601.

It is an arithmetic number, because the mean of its divisors is an integer number (987945601).

Almost surely, 2^1975891201 is an apocalyptic number.

It is an amenable number.

1975891201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1975891201 is an equidigital number, since it uses as much as digits as its factorization.

1975891201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 43.

The square root of 1975891201 is about 44450.9977503318. The cubic root of 1975891201 is about 1254.8380400829.

The spelling of 1975891201 in words is "one billion, nine hundred seventy-five million, eight hundred ninety-one thousand, two hundred one".