78963657 has 8 divisors (see below), whose sum is σ = 111478176. Its totient is φ = 49545792.

The previous prime is 78963613. The next prime is 78963673. The reversal of 78963657 is 75636987.

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

It is not a de Polignac number, because 78963657 - 2¹⁶ = 78898121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 1548307 = 78963657 / (7 + 8 + 9 + 6 + 3 + 6 + 5 + 7).

It is not an unprimeable number, because it can be changed into a prime (78961657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 774103 + ... + 774204.

It is an arithmetic number, because the mean of its divisors is an integer number (13934772).

Almost surely, 2^78963657 is an apocalyptic number.

It is an amenable number.

78963657 is a deficient number, since it is larger than the sum of its proper divisors (32514519).

78963657 is a wasteful number, since it uses less digits than its factorization.

78963657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548327.

The product of its digits is 1905120, while the sum is 51.

The square root of 78963657 is about 8886.1497286508. The cubic root of 78963657 is about 429.0182342921.

It can be divided in two parts, 789 and 63657, that added together give a palindrome (64446).

The spelling of 78963657 in words is "seventy-eight million, nine hundred sixty-three thousand, six hundred fifty-seven".