78098365 has 4 divisors (see below), whose sum is σ = 93718044. Its totient is φ = 62478688.

The previous prime is 78098347. The next prime is 78098387. The reversal of 78098365 is 56389087.

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 61889689 + 16208676 = 7867^2 + 4026^2 .

It is a cyclic number.

It is not a de Polignac number, because 78098365 - 2⁹ = 78097853 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, 7809832 + ... + 7809841.

It is an arithmetic number, because the mean of its divisors is an integer number (23429511).

Almost surely, 2^78098365 is an apocalyptic number.

It is an amenable number.

78098365 is a deficient number, since it is larger than the sum of its proper divisors (15619679).

78098365 is a wasteful number, since it uses less digits than its factorization.

78098365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15619678.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 78098365 is about 8837.3279332613. The cubic root of 78098365 is about 427.4453995906.

The spelling of 78098365 in words is "seventy-eight million, ninety-eight thousand, three hundred sixty-five".