1491794067 has 4 divisors (see below), whose sum is σ = 1989058760. Its totient is φ = 994529376.

The previous prime is 1491794039. The next prime is 1491794077. The reversal of 1491794067 is 7604971941.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-1491794067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1491794027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248632342 + ... + 248632347.

It is an arithmetic number, because the mean of its divisors is an integer number (497264690).

Almost surely, 2^1491794067 is an apocalyptic number.

1491794067 is a deficient number, since it is larger than the sum of its proper divisors (497264693).

1491794067 is an equidigital number, since it uses as much as digits as its factorization.

1491794067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497264692.

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 1491794067 is about 38623.7500380271. The cubic root of 1491794067 is about 1142.6229914501.

The spelling of 1491794067 in words is "one billion, four hundred ninety-one million, seven hundred ninety-four thousand, sixty-seven".