1427719757 has 4 divisors (see below), whose sum is σ = 1427800476. Its totient is φ = 1427639040.

The previous prime is 1427719697. The next prime is 1427719781. The reversal of 1427719757 is 7579177241.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7579177241 = 281 ⋅26972161.

It can be written as a sum of positive squares in 2 ways, for example, as 697963561 + 729756196 = 26419^2 + 27014^2 .

It is a cyclic number.

It is not a de Polignac number, because 1427719757 - 2²⁴ = 1410942541 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 (1427719057) 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, 1094 + ... + 53447.

It is an arithmetic number, because the mean of its divisors is an integer number (356950119).

Almost surely, 2^1427719757 is an apocalyptic number.

It is an amenable number.

1427719757 is a deficient number, since it is larger than the sum of its proper divisors (80719).

1427719757 is an equidigital number, since it uses as much as digits as its factorization.

1427719757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80718.

The product of its digits is 864360, while the sum is 50.

The square root of 1427719757 is about 37785.1790653425. The cubic root of 1427719757 is about 1126.0240241817.

The spelling of 1427719757 in words is "one billion, four hundred twenty-seven million, seven hundred nineteen thousand, seven hundred fifty-seven".