1890712793 has 2 divisors, whose sum is σ = 1890712794. Its totient is φ = 1890712792.

The previous prime is 1890712717. The next prime is 1890712799. The reversal of 1890712793 is 3972170981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1798014409 + 92698384 = 42403^2 + 9628^2 .

It is an emirp because it is prime and its reverse (3972170981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1890712793 - 2¹⁰ = 1890711769 is a prime.

It is a super-2 number, since 2×1890712793² = 7149589731227721698, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1890712799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 945356396 + 945356397.

It is an arithmetic number, because the mean of its divisors is an integer number (945356397).

Almost surely, 2^1890712793 is an apocalyptic number.

It is an amenable number.

1890712793 is a deficient number, since it is larger than the sum of its proper divisors (1).

1890712793 is an equidigital number, since it uses as much as digits as its factorization.

1890712793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 1890712793 is about 43482.3273641143. The cubic root of 1890712793 is about 1236.5410002120.

The spelling of 1890712793 in words is "one billion, eight hundred ninety million, seven hundred twelve thousand, seven hundred ninety-three".