78585969 has 32 divisors (see below), whose sum is σ = 135152640. Its totient is φ = 39412800.

The previous prime is 78585967. The next prime is 78585973. The reversal of 78585969 is 96958587.

It is not a de Polignac number, because 78585969 - 2¹ = 78585967 is a prime.

It is a super-2 number, since 2×78585969² = 12351509047337922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78585967) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 834 + ... + 12564.

It is an arithmetic number, because the mean of its divisors is an integer number (4223520).

Almost surely, 2^78585969 is an apocalyptic number.

It is an amenable number.

78585969 is a deficient number, since it is larger than the sum of its proper divisors (56566671).

78585969 is a wasteful number, since it uses less digits than its factorization.

78585969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11781.

The product of its digits is 5443200, while the sum is 57.

The square root of 78585969 is about 8864.8727571240. The cubic root of 78585969 is about 428.3331340199. Note that the first 3 decimals are identical.

The spelling of 78585969 in words is "seventy-eight million, five hundred eighty-five thousand, nine hundred sixty-nine".