1901881061 has 2 divisors, whose sum is σ = 1901881062. Its totient is φ = 1901881060.

The previous prime is 1901881049. The next prime is 1901881073. The reversal of 1901881061 is 1601881091.

It is a balanced prime because it is at equal distance from previous prime (1901881049) and next prime (1901881073).

It can be written as a sum of positive squares in only one way, i.e., 1430730625 + 471150436 = 37825^2 + 21706^2 .

It is a cyclic number.

It is not a de Polignac number, because 1901881061 - 2¹⁴ = 1901864677 is a prime.

1901881061 is a strobogrammatic number because it is the same when read upside-down.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1901881021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 950940530 + 950940531.

It is an arithmetic number, because the mean of its divisors is an integer number (950940531).

Almost surely, 2^1901881061 is an apocalyptic number.

It is an amenable number.

1901881061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1901881061 is an equidigital number, since it uses as much as digits as its factorization.

1901881061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 35.

The square root of 1901881061 is about 43610.5613469948. The cubic root of 1901881061 is about 1238.9709336397.

The spelling of 1901881061 in words is "one billion, nine hundred one million, eight hundred eighty-one thousand, sixty-one".