78496247 has 4 divisors (see below), whose sum is σ = 81028416. Its totient is φ = 75964080.

The previous prime is 78496213. The next prime is 78496283. The reversal of 78496247 is 74269487.

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 78496247 - 2¹² = 78492151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78496207) 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, 1266038 + ... + 1266099.

It is an arithmetic number, because the mean of its divisors is an integer number (20257104).

Almost surely, 2^78496247 is an apocalyptic number.

78496247 is a deficient number, since it is larger than the sum of its proper divisors (2532169).

78496247 is a wasteful number, since it uses less digits than its factorization.

78496247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532168.

The product of its digits is 677376, while the sum is 47.

The square root of 78496247 is about 8859.8107767604. The cubic root of 78496247 is about 428.1700619058.

The spelling of 78496247 in words is "seventy-eight million, four hundred ninety-six thousand, two hundred forty-seven".