78959651 has 4 divisors (see below), whose sum is σ = 79053072. Its totient is φ = 78866232.

The previous prime is 78959633. The next prime is 78959677. The reversal of 78959651 is 15695987.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78959651 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78959651.

It is not an unprimeable number, because it can be changed into a prime (78959351) 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, 45431 + ... + 47136.

It is an arithmetic number, because the mean of its divisors is an integer number (19763268).

Almost surely, 2^78959651 is an apocalyptic number.

78959651 is a deficient number, since it is larger than the sum of its proper divisors (93421).

78959651 is an equidigital number, since it uses as much as digits as its factorization.

78959651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93420.

The product of its digits is 680400, while the sum is 50.

The square root of 78959651 is about 8885.9243188314. The cubic root of 78959651 is about 429.0109791566.

The spelling of 78959651 in words is "seventy-eight million, nine hundred fifty-nine thousand, six hundred fifty-one".