1427787649 has 4 divisors (see below), whose sum is σ = 1462611780. Its totient is φ = 1392963520.

The previous prime is 1427787607. The next prime is 1427787659. The reversal of 1427787649 is 9467877241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9467877241 = 137 ⋅69108593.

It can be written as a sum of positive squares in 2 ways, for example, as 267159025 + 1160628624 = 16345^2 + 34068^2 .

It is not a de Polignac number, because 1427787649 - 2⁷ = 1427787521 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 1427787649.

It is not an unprimeable number, because it can be changed into a prime (1427787659) 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, 17412004 + ... + 17412085.

It is an arithmetic number, because the mean of its divisors is an integer number (365652945).

Almost surely, 2^1427787649 is an apocalyptic number.

It is an amenable number.

1427787649 is a deficient number, since it is larger than the sum of its proper divisors (34824131).

1427787649 is an equidigital number, since it uses as much as digits as its factorization.

1427787649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34824130.

The product of its digits is 4741632, while the sum is 55.

The square root of 1427787649 is about 37786.0774492405. The cubic root of 1427787649 is about 1126.0418724116.

It can be divided in two parts, 14277 and 87649, that added together give a triangular number (101926 = T₄₅₁).

The spelling of 1427787649 in words is "one billion, four hundred twenty-seven million, seven hundred eighty-seven thousand, six hundred forty-nine".