1427881391 has 8 divisors (see below), whose sum is σ = 1513195344. Its totient is φ = 1342714240.

The previous prime is 1427881373. The next prime is 1427881397. The reversal of 1427881391 is 1931887241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1427881391 - 2⁶ = 1427881327 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 (1427881397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16340 + ... + 55881.

It is an arithmetic number, because the mean of its divisors is an integer number (189149418).

Almost surely, 2^1427881391 is an apocalyptic number.

1427881391 is a deficient number, since it is larger than the sum of its proper divisors (85313953).

1427881391 is a wasteful number, since it uses less digits than its factorization.

1427881391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73401.

The product of its digits is 96768, while the sum is 44.

The square root of 1427881391 is about 37787.3178593030. The cubic root of 1427881391 is about 1126.0665154569.

The spelling of 1427881391 in words is "one billion, four hundred twenty-seven million, eight hundred eighty-one thousand, three hundred ninety-one".