78353347 has 4 divisors (see below), whose sum is σ = 78487416. Its totient is φ = 78219280.

The previous prime is 78353333. The next prime is 78353369. The reversal of 78353347 is 74335387.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74335387 = 7 ⋅10619341.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78353347 is a prime.

It is a super-2 number, since 2×78353347² = 12278493972204818, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78353377) 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, 66154 + ... + 67327.

It is an arithmetic number, because the mean of its divisors is an integer number (19621854).

Almost surely, 2^78353347 is an apocalyptic number.

78353347 is a deficient number, since it is larger than the sum of its proper divisors (134069).

78353347 is a wasteful number, since it uses less digits than its factorization.

78353347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134068.

The product of its digits is 211680, while the sum is 40.

The square root of 78353347 is about 8851.7425967998. The cubic root of 78353347 is about 427.9100806092.

The spelling of 78353347 in words is "seventy-eight million, three hundred fifty-three thousand, three hundred forty-seven".