1427605897 has 4 divisors (see below), whose sum is σ = 1438026516. Its totient is φ = 1417185280.

The previous prime is 1427605873. The next prime is 1427605909. The reversal of 1427605897 is 7985067241.

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 773729856 + 653876041 = 27816^2 + 25571^2 .

It is a cyclic number.

It is not a de Polignac number, because 1427605897 - 2¹⁵ = 1427573129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1427605897.

It is not an unprimeable number, because it can be changed into a prime (1427605807) 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, 5210104 + ... + 5210377.

It is an arithmetic number, because the mean of its divisors is an integer number (359506629).

Almost surely, 2^1427605897 is an apocalyptic number.

It is an amenable number.

1427605897 is a deficient number, since it is larger than the sum of its proper divisors (10420619).

1427605897 is a wasteful number, since it uses less digits than its factorization.

1427605897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10420618.

The product of its (nonzero) digits is 846720, while the sum is 49.

The square root of 1427605897 is about 37783.6723598964. The cubic root of 1427605897 is about 1125.9940900850.

The spelling of 1427605897 in words is "one billion, four hundred twenty-seven million, six hundred five thousand, eight hundred ninety-seven".