1347638465 has 4 divisors (see below), whose sum is σ = 1617166164. Its totient is φ = 1078110768.

The previous prime is 1347638459. The next prime is 1347638477. The reversal of 1347638465 is 5648367431.

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 236882881 + 1110755584 = 15391^2 + 33328^2 .

It is a cyclic number.

It is not a de Polignac number, because 1347638465 - 2¹⁰ = 1347637441 is a prime.

It is a super-2 number, since 2×1347638465² = 3632258864695112450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134763842 + ... + 134763851.

It is an arithmetic number, because the mean of its divisors is an integer number (404291541).

Almost surely, 2^1347638465 is an apocalyptic number.

It is an amenable number.

1347638465 is a deficient number, since it is larger than the sum of its proper divisors (269527699).

1347638465 is an equidigital number, since it uses as much as digits as its factorization.

1347638465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269527698.

The product of its digits is 1451520, while the sum is 47.

The square root of 1347638465 is about 36710.1956546134. The cubic root of 1347638465 is about 1104.5646312832.

The spelling of 1347638465 in words is "one billion, three hundred forty-seven million, six hundred thirty-eight thousand, four hundred sixty-five".