78142963 has 4 divisors (see below), whose sum is σ = 79467480. Its totient is φ = 76818448.

The previous prime is 78142951. The next prime is 78143011. The reversal of 78142963 is 36924187.

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 78142963 - 2⁹ = 78142451 is a prime.

It is a super-2 number, since 2×78142963² = 12212645332838738, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78142903) 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, 662170 + ... + 662287.

It is an arithmetic number, because the mean of its divisors is an integer number (19866870).

Almost surely, 2^78142963 is an apocalyptic number.

78142963 is a deficient number, since it is larger than the sum of its proper divisors (1324517).

78142963 is a wasteful number, since it uses less digits than its factorization.

78142963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324516.

The product of its digits is 72576, while the sum is 40.

The square root of 78142963 is about 8839.8508471580. The cubic root of 78142963 is about 427.5267482095.

The spelling of 78142963 in words is "seventy-eight million, one hundred forty-two thousand, nine hundred sixty-three".