1889920093 has 2 divisors, whose sum is σ = 1889920094. Its totient is φ = 1889920092.

The previous prime is 1889920079. The next prime is 1889920099. The reversal of 1889920093 is 3900299881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1767109369 + 122810724 = 42037^2 + 11082^2 .

It is a cyclic number.

It is not a de Polignac number, because 1889920093 - 2¹³ = 1889911901 is a prime.

It is a super-5 number, since 5×1889920093⁵ (a number of 48 digits) contains 55555 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1889920099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 944960046 + 944960047.

It is an arithmetic number, because the mean of its divisors is an integer number (944960047).

Almost surely, 2^1889920093 is an apocalyptic number.

It is an amenable number.

1889920093 is a deficient number, since it is larger than the sum of its proper divisors (1).

1889920093 is an equidigital number, since it uses as much as digits as its factorization.

1889920093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 1889920093 is about 43473.2112110435. The cubic root of 1889920093 is about 1236.3681653825.

The spelling of 1889920093 in words is "one billion, eight hundred eighty-nine million, nine hundred twenty thousand, ninety-three".