78247963 has 4 divisors (see below), whose sum is σ = 78495120. Its totient is φ = 78000808.

The previous prime is 78247951. The next prime is 78247979. The reversal of 78247963 is 36974287.

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 78247963 - 2⁵ = 78247931 is a prime.

It is a super-2 number, since 2×78247963² = 12245487427298738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78247943) 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, 123103 + ... + 123736.

It is an arithmetic number, because the mean of its divisors is an integer number (19623780).

Almost surely, 2^78247963 is an apocalyptic number.

78247963 is a deficient number, since it is larger than the sum of its proper divisors (247157).

78247963 is a wasteful number, since it uses less digits than its factorization.

78247963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247156.

The product of its digits is 508032, while the sum is 46.

The square root of 78247963 is about 8845.7878676803. The cubic root of 78247963 is about 427.7181504617.

The spelling of 78247963 in words is "seventy-eight million, two hundred forty-seven thousand, nine hundred sixty-three".