78461191 has 8 divisors (see below), whose sum is σ = 79533440. Its totient is φ = 77396472.

The previous prime is 78461183. The next prime is 78461219. The reversal of 78461191 is 19116487.

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 78461191 - 2³ = 78461183 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78461191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78461291) 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 7 ways as a sum of consecutive naturals, for example, 20926 + ... + 24388.

It is an arithmetic number, because the mean of its divisors is an integer number (9941680).

Almost surely, 2^78461191 is an apocalyptic number.

78461191 is a deficient number, since it is larger than the sum of its proper divisors (1072249).

78461191 is a wasteful number, since it uses less digits than its factorization.

78461191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3765.

The product of its digits is 12096, while the sum is 37.

The square root of 78461191 is about 8857.8321840053. The cubic root of 78461191 is about 428.1063129357.

The spelling of 78461191 in words is "seventy-eight million, four hundred sixty-one thousand, one hundred ninety-one".