1020791194 has 4 divisors (see below), whose sum is σ = 1531186794. Its totient is φ = 510395596.

The previous prime is 1020791179. The next prime is 1020791201. The reversal of 1020791194 is 4911970201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4911970201 = 281 ⋅17480321.

It can be written as a sum of positive squares in only one way, i.e., 671587225 + 349203969 = 25915^2 + 18687^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255197797 + ... + 255197800.

Almost surely, 2^1020791194 is an apocalyptic number.

1020791194 is a deficient number, since it is larger than the sum of its proper divisors (510395600).

1020791194 is an equidigital number, since it uses as much as digits as its factorization.

1020791194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510395599.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 1020791194 is about 31949.8230668027. The cubic root of 1020791194 is about 1006.8829147924.

The spelling of 1020791194 in words is "one billion, twenty million, seven hundred ninety-one thousand, one hundred ninety-four".