1930211193 has 4 divisors (see below), whose sum is σ = 2573614928. Its totient is φ = 1286807460.

The previous prime is 1930211141. The next prime is 1930211201. The reversal of 1930211193 is 3911120391.

It is a happy number.

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.

It is a de Polignac number, because none of the positive numbers 2^k-1930211193 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1930211193.

It is not an unprimeable number, because it can be changed into a prime (1930211123) 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, 321701863 + ... + 321701868.

It is an arithmetic number, because the mean of its divisors is an integer number (643403732).

Almost surely, 2^1930211193 is an apocalyptic number.

It is an amenable number.

1930211193 is a deficient number, since it is larger than the sum of its proper divisors (643403735).

1930211193 is an equidigital number, since it uses as much as digits as its factorization.

1930211193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643403734.

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 1930211193 is about 43934.1688552316. The cubic root of 1930211193 is about 1245.0924793806.

The spelling of 1930211193 in words is "one billion, nine hundred thirty million, two hundred eleven thousand, one hundred ninety-three".