78141791 has 8 divisors (see below), whose sum is σ = 96174624. Its totient is φ = 61826400.

The previous prime is 78141751. The next prime is 78141803. The reversal of 78141791 is 19714187.

It is a happy number.

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 78141791 - 2⁶ = 78141727 is a prime.

It is a super-2 number, since 2×78141791² = 12212279001375362, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78141751) 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, 429260 + ... + 429441.

It is an arithmetic number, because the mean of its divisors is an integer number (12021828).

Almost surely, 2^78141791 is an apocalyptic number.

78141791 is a deficient number, since it is larger than the sum of its proper divisors (18032833).

78141791 is a wasteful number, since it uses less digits than its factorization.

78141791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858721.

The product of its digits is 14112, while the sum is 38.

The square root of 78141791 is about 8839.7845561982. The cubic root of 78141791 is about 427.5246108285.

The spelling of 78141791 in words is "seventy-eight million, one hundred forty-one thousand, seven hundred ninety-one".