1890030673 has 4 divisors (see below), whose sum is σ = 1890186480. Its totient is φ = 1889874868.

The previous prime is 1890030631. The next prime is 1890030689. The reversal of 1890030673 is 3760300981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3760300981 = 23 ⋅163491347.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1890030673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1890030613) 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, 58015 + ... + 84532.

It is an arithmetic number, because the mean of its divisors is an integer number (472546620).

Almost surely, 2^1890030673 is an apocalyptic number.

It is an amenable number.

1890030673 is a deficient number, since it is larger than the sum of its proper divisors (155807).

1890030673 is a wasteful number, since it uses less digits than its factorization.

1890030673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155806.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 1890030673 is about 43474.4830101521. The cubic root of 1890030673 is about 1236.3922783817.

The spelling of 1890030673 in words is "one billion, eight hundred ninety million, thirty thousand, six hundred seventy-three".