78787241 has 8 divisors (see below), whose sum is σ = 84927360. Its totient is φ = 72658512.

The previous prime is 78787237. The next prime is 78787249. The reversal of 78787241 is 14278787.

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 78787241 - 2² = 78787237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78787192 and 78787201.

It is not an unprimeable number, because it can be changed into a prime (78787249) 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, 16370 + ... + 20628.

It is an arithmetic number, because the mean of its divisors is an integer number (10615920).

Almost surely, 2^78787241 is an apocalyptic number.

It is an amenable number.

78787241 is a deficient number, since it is larger than the sum of its proper divisors (6140119).

78787241 is a wasteful number, since it uses less digits than its factorization.

78787241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5695.

The product of its digits is 175616, while the sum is 44.

The square root of 78787241 is about 8876.2177192766. The cubic root of 78787241 is about 428.6985002189.

The spelling of 78787241 in words is "seventy-eight million, seven hundred eighty-seven thousand, two hundred forty-one".