78098693 has 4 divisors (see below), whose sum is σ = 78230988. Its totient is φ = 77966400.

The previous prime is 78098659. The next prime is 78098717. The reversal of 78098693 is 39689087.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39689087 = 139 ⋅285533.

It can be written as a sum of positive squares in 2 ways, for example, as 40729924 + 37368769 = 6382^2 + 6113^2 .

It is a cyclic number.

It is not a de Polignac number, because 78098693 - 2⁸ = 78098437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78097693) 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, 65258 + ... + 66443.

It is an arithmetic number, because the mean of its divisors is an integer number (19557747).

Almost surely, 2^78098693 is an apocalyptic number.

It is an amenable number.

78098693 is a deficient number, since it is larger than the sum of its proper divisors (132295).

78098693 is a wasteful number, since it uses less digits than its factorization.

78098693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132294.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 78098693 is about 8837.3464908874. The cubic root of 78098693 is about 427.4459979893.

The spelling of 78098693 in words is "seventy-eight million, ninety-eight thousand, six hundred ninety-three".