1427726791 has 4 divisors (see below), whose sum is σ = 1437309000. Its totient is φ = 1418144584.

The previous prime is 1427726779. The next prime is 1427726803. The reversal of 1427726791 is 1976277241.

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

It is an interprime number because it is at equal distance from previous prime (1427726779) and next prime (1427726803).

It is a cyclic number.

It is not a de Polignac number, because 1427726791 - 2¹⁹ = 1427202503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1427726701) 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, 4790881 + ... + 4791178.

It is an arithmetic number, because the mean of its divisors is an integer number (359327250).

Almost surely, 2^1427726791 is an apocalyptic number.

1427726791 is a deficient number, since it is larger than the sum of its proper divisors (9582209).

1427726791 is an equidigital number, since it uses as much as digits as its factorization.

1427726791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9582208.

The product of its digits is 296352, while the sum is 46.

The square root of 1427726791 is about 37785.2721440510. The cubic root of 1427726791 is about 1126.0258733868.

The spelling of 1427726791 in words is "one billion, four hundred twenty-seven million, seven hundred twenty-six thousand, seven hundred ninety-one".