78550797 has 16 divisors (see below), whose sum is σ = 112968128. Its totient is φ = 48263040.

The previous prime is 78550783. The next prime is 78550861. The reversal of 78550797 is 79705587.

It is not a de Polignac number, because 78550797 - 2⁴ = 78550781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78550597) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33297 + ... + 35577.

It is an arithmetic number, because the mean of its divisors is an integer number (7060508).

Almost surely, 2^78550797 is an apocalyptic number.

It is an amenable number.

78550797 is a deficient number, since it is larger than the sum of its proper divisors (34417331).

78550797 is a wasteful number, since it uses less digits than its factorization.

78550797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3180.

The product of its (nonzero) digits is 617400, while the sum is 48.

The square root of 78550797 is about 8862.8887502890. Note that the first 3 decimals coincide. The cubic root of 78550797 is about 428.2692227760.

The spelling of 78550797 in words is "seventy-eight million, five hundred fifty thousand, seven hundred ninety-seven".