78496947 has 6 divisors (see below), whose sum is σ = 113384492. Its totient is φ = 52331292.

The previous prime is 78496937. The next prime is 78496967. The reversal of 78496947 is 74969487.

It is a happy number.

It is not a de Polignac number, because 78496947 - 2⁴ = 78496931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78496893 and 78496902.

It is not an unprimeable number, because it can be changed into a prime (78496937) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4360933 + ... + 4360950.

Almost surely, 2^78496947 is an apocalyptic number.

78496947 is a deficient number, since it is larger than the sum of its proper divisors (34887545).

78496947 is a wasteful number, since it uses less digits than its factorization.

78496947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8721889 (or 8721886 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 78496947 is about 8859.8502809020. The cubic root of 78496947 is about 428.1713346552.

It can be divided in two parts, 78 and 496947, that added together give a square (497025 = 705²).

The spelling of 78496947 in words is "seventy-eight million, four hundred ninety-six thousand, nine hundred forty-seven".