78611073 has 4 divisors (see below), whose sum is σ = 104814768. Its totient is φ = 52407380.

The previous prime is 78611047. The next prime is 78611107. The reversal of 78611073 is 37011687.

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, and also an emirpimes, since its reverse is a distinct semiprime: 37011687 = 3 ⋅12337229.

It is a cyclic number.

It is not a de Polignac number, because 78611073 - 2¹⁷ = 78480001 is a prime.

It is a super-2 number, since 2×78611073² = 12359401596422658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78611003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13101843 + ... + 13101848.

It is an arithmetic number, because the mean of its divisors is an integer number (26203692).

Almost surely, 2^78611073 is an apocalyptic number.

It is an amenable number.

78611073 is a deficient number, since it is larger than the sum of its proper divisors (26203695).

78611073 is a wasteful number, since it uses less digits than its factorization.

78611073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26203694.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 78611073 is about 8866.2885696327. The cubic root of 78611073 is about 428.3787389812.

The spelling of 78611073 in words is "seventy-eight million, six hundred eleven thousand, seventy-three".