738678565 has 4 divisors (see below), whose sum is σ = 886414284. Its totient is φ = 590942848.

The previous prime is 738678559. The next prime is 738678581. The reversal of 738678565 is 565876837.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 565876837 = 19073 ⋅29669.

It can be written as a sum of positive squares in 2 ways, for example, as 329749281 + 408929284 = 18159^2 + 20222^2 .

It is a cyclic number.

It is not a de Polignac number, because 738678565 - 2¹⁵ = 738645797 is a prime.

It is a Duffinian number.

It is a congruent 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, 73867852 + ... + 73867861.

It is an arithmetic number, because the mean of its divisors is an integer number (221603571).

Almost surely, 2^738678565 is an apocalyptic number.

It is an amenable number.

738678565 is a deficient number, since it is larger than the sum of its proper divisors (147735719).

738678565 is a wasteful number, since it uses less digits than its factorization.

738678565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147735718.

The product of its digits is 8467200, while the sum is 55.

The square root of 738678565 is about 27178.6417063105. The cubic root of 738678565 is about 903.9654508979.

The spelling of 738678565 in words is "seven hundred thirty-eight million, six hundred seventy-eight thousand, five hundred sixty-five".