1427911697 has 4 divisors (see below), whose sum is σ = 1429677540. Its totient is φ = 1426145856.

The previous prime is 1427911669. The next prime is 1427911699. The reversal of 1427911697 is 7961197241.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1014358801 + 413552896 = 31849^2 + 20336^2 .

It is a cyclic number.

It is not a de Polignac number, because 1427911697 - 2¹² = 1427907601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1427911699) 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, 881708 + ... + 883325.

It is an arithmetic number, because the mean of its divisors is an integer number (357419385).

Almost surely, 2^1427911697 is an apocalyptic number.

It is an amenable number.

1427911697 is a deficient number, since it is larger than the sum of its proper divisors (1765843).

1427911697 is an equidigital number, since it uses as much as digits as its factorization.

1427911697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1765842.

The product of its digits is 190512, while the sum is 47.

The square root of 1427911697 is about 37787.7188647317. The cubic root of 1427911697 is about 1126.0744821155.

The spelling of 1427911697 in words is "one billion, four hundred twenty-seven million, nine hundred eleven thousand, six hundred ninety-seven".