78787151 has 8 divisors (see below), whose sum is σ = 81489408. Its totient is φ = 76095000.

The previous prime is 78787133. The next prime is 78787157. The reversal of 78787151 is 15178787.

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 a de Polignac number, because none of the positive numbers 2^k-78787151 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 (78787157) 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, 15476 + ... + 19926.

It is an arithmetic number, because the mean of its divisors is an integer number (10186176).

Almost surely, 2^78787151 is an apocalyptic number.

78787151 is a deficient number, since it is larger than the sum of its proper divisors (2702257).

78787151 is a wasteful number, since it uses less digits than its factorization.

78787151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5053.

The product of its digits is 109760, while the sum is 44.

The square root of 78787151 is about 8876.2126495482. The cubic root of 78787151 is about 428.6983369824.

The spelling of 78787151 in words is "seventy-eight million, seven hundred eighty-seven thousand, one hundred fifty-one".