1919085061 has 2 divisors, whose sum is σ = 1919085062. Its totient is φ = 1919085060.

The previous prime is 1919085019. The next prime is 1919085089. The reversal of 1919085061 is 1605809191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1705194436 + 213890625 = 41294^2 + 14625^2 .

It is a cyclic number.

It is not a de Polignac number, because 1919085061 - 2¹¹ = 1919083013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1919085361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959542530 + 959542531.

It is an arithmetic number, because the mean of its divisors is an integer number (959542531).

Almost surely, 2^1919085061 is an apocalyptic number.

It is an amenable number.

1919085061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1919085061 is an equidigital number, since it uses as much as digits as its factorization.

1919085061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 40.

The square root of 1919085061 is about 43807.3630911517. The cubic root of 1919085061 is about 1242.6955454439.

The spelling of 1919085061 in words is "one billion, nine hundred nineteen million, eighty-five thousand, sixty-one".