1890326117 has 4 divisors (see below), whose sum is σ = 1894462956. Its totient is φ = 1886189280.

The previous prime is 1890326107. The next prime is 1890326161. The reversal of 1890326117 is 7116230981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7116230981 = 23 ⋅309401347.

It can be written as a sum of positive squares in 2 ways, for example, as 960442081 + 929884036 = 30991^2 + 30494^2 .

It is a cyclic number.

It is not a de Polignac number, because 1890326117 - 2⁸ = 1890325861 is a prime.

It is a super-2 number, since 2×1890326117² = 7146665657224595378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1890326107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2067734 + ... + 2068647.

It is an arithmetic number, because the mean of its divisors is an integer number (473615739).

Almost surely, 2^1890326117 is an apocalyptic number.

It is an amenable number.

1890326117 is a deficient number, since it is larger than the sum of its proper divisors (4136839).

1890326117 is an equidigital number, since it uses as much as digits as its factorization.

1890326117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4136838.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 1890326117 is about 43477.8807786212. The cubic root of 1890326117 is about 1236.4566980856.

The spelling of 1890326117 in words is "one billion, eight hundred ninety million, three hundred twenty-six thousand, one hundred seventeen".