78982151 has 4 divisors (see below), whose sum is σ = 79749072. Its totient is φ = 78215232.

The previous prime is 78982121. The next prime is 78982159. The reversal of 78982151 is 15128987.

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

It is a cyclic number.

It is not a de Polignac number, because 78982151 - 2¹⁰ = 78981127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78982099 and 78982108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78982159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383306 + ... + 383511.

It is an arithmetic number, because the mean of its divisors is an integer number (19937268).

Almost surely, 2^78982151 is an apocalyptic number.

78982151 is a deficient number, since it is larger than the sum of its proper divisors (766921).

78982151 is a wasteful number, since it uses less digits than its factorization.

78982151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766920.

The product of its digits is 40320, while the sum is 41.

The square root of 78982151 is about 8887.1902758971. The cubic root of 78982151 is about 429.0517249898.

The spelling of 78982151 in words is "seventy-eight million, nine hundred eighty-two thousand, one hundred fifty-one".