78101005 has 8 divisors (see below), whose sum is σ = 94687992. Its totient is φ = 61836288.

The previous prime is 78101003. The next prime is 78101027. The reversal of 78101005 is 50010187.

It can be written as a sum of positive squares in 4 ways, for example, as 7322436 + 70778569 = 2706^2 + 8413^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78101005 - 2¹ = 78101003 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 (78101003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80032 + ... + 81001.

It is an arithmetic number, because the mean of its divisors is an integer number (11835999).

Almost surely, 2^78101005 is an apocalyptic number.

It is an amenable number.

78101005 is a deficient number, since it is larger than the sum of its proper divisors (16586987).

78101005 is a wasteful number, since it uses less digits than its factorization.

78101005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161135.

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 78101005 is about 8837.4772984150. The cubic root of 78101005 is about 427.4502159233.

The spelling of 78101005 in words is "seventy-eight million, one hundred one thousand, five".