1901801273 has 2 divisors, whose sum is σ = 1901801274. Its totient is φ = 1901801272.

The previous prime is 1901801269. The next prime is 1901801281. The reversal of 1901801273 is 3721081091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1779742969 + 122058304 = 42187^2 + 11048^2 .

It is a cyclic number.

It is not a de Polignac number, because 1901801273 - 2² = 1901801269 is a prime.

It is not a weakly prime, because it can be changed into another prime (1901801263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 950900636 + 950900637.

It is an arithmetic number, because the mean of its divisors is an integer number (950900637).

Almost surely, 2^1901801273 is an apocalyptic number.

It is an amenable number.

1901801273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1901801273 is an equidigital number, since it uses as much as digits as its factorization.

1901801273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 1901801273 is about 43609.6465589897. The cubic root of 1901801273 is about 1238.9536075658.

The spelling of 1901801273 in words is "one billion, nine hundred one million, eight hundred one thousand, two hundred seventy-three".