78363951 has 8 divisors (see below), whose sum is σ = 104621184. Its totient is φ = 52174680.

The previous prime is 78363947. The next prime is 78363959. The reversal of 78363951 is 15936387.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78363951 - 2² = 78363947 is a prime.

It is a super-2 number, since 2×78363951² = 12281817632660802, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78363959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14235 + ... + 18956.

It is an arithmetic number, because the mean of its divisors is an integer number (13077648).

Almost surely, 2^78363951 is an apocalyptic number.

78363951 is a deficient number, since it is larger than the sum of its proper divisors (26257233).

78363951 is a wasteful number, since it uses less digits than its factorization.

78363951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33981.

The product of its digits is 136080, while the sum is 42.

The square root of 78363951 is about 8852.3415546397. The cubic root of 78363951 is about 427.9293835660.

The spelling of 78363951 in words is "seventy-eight million, three hundred sixty-three thousand, nine hundred fifty-one".