78063139 has 32 divisors (see below), whose sum is σ = 101283840. Its totient is φ = 58406400.

The previous prime is 78063137. The next prime is 78063149. The reversal of 78063139 is 93136087.

It is a cyclic number.

It is not a de Polignac number, because 78063139 - 2¹ = 78063137 is a prime.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 78063098 and 78063107.

It is not an unprimeable number, because it can be changed into a prime (78063131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 249247 + ... + 249559.

It is an arithmetic number, because the mean of its divisors is an integer number (3165120).

Almost surely, 2^78063139 is an apocalyptic number.

78063139 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

78063139 is a deficient number, since it is larger than the sum of its proper divisors (23220701).

78063139 is a wasteful number, since it uses less digits than its factorization.

78063139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 78063139 is about 8835.3346852284. The cubic root of 78063139 is about 427.3811239981.

The spelling of 78063139 in words is "seventy-eight million, sixty-three thousand, one hundred thirty-nine".