78133141 has 4 divisors (see below), whose sum is σ = 79203532. Its totient is φ = 77062752.

The previous prime is 78133127. The next prime is 78133147. The reversal of 78133141 is 14133187.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33524100 + 44609041 = 5790^2 + 6679^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78133141 is a prime.

It is a super-2 number, since 2×78133141² = 12209575445051762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78133147) 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, 535086 + ... + 535231.

It is an arithmetic number, because the mean of its divisors is an integer number (19800883).

Almost surely, 2^78133141 is an apocalyptic number.

It is an amenable number.

78133141 is a deficient number, since it is larger than the sum of its proper divisors (1070391).

78133141 is a wasteful number, since it uses less digits than its factorization.

78133141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070390.

The product of its digits is 2016, while the sum is 28.

The square root of 78133141 is about 8839.2952773397. The cubic root of 78133141 is about 427.5088351286.

The spelling of 78133141 in words is "seventy-eight million, one hundred thirty-three thousand, one hundred forty-one".