78534797 has 4 divisors (see below), whose sum is σ = 85674336. Its totient is φ = 71395260.

The previous prime is 78534793. The next prime is 78534823. The reversal of 78534797 is 79743587.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78534797 - 2² = 78534793 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78534793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3569753 + ... + 3569774.

It is an arithmetic number, because the mean of its divisors is an integer number (21418584).

Almost surely, 2^78534797 is an apocalyptic number.

It is an amenable number.

78534797 is a deficient number, since it is larger than the sum of its proper divisors (7139539).

78534797 is a wasteful number, since it uses less digits than its factorization.

78534797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7139538.

The product of its digits is 1481760, while the sum is 50.

The square root of 78534797 is about 8861.9860640829. The cubic root of 78534797 is about 428.2401427704.

The spelling of 78534797 in words is "seventy-eight million, five hundred thirty-four thousand, seven hundred ninety-seven".