78473207 has 4 divisors (see below), whose sum is σ = 83089296. Its totient is φ = 73857120.

The previous prime is 78473201. The next prime is 78473233. The reversal of 78473207 is 70237487.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70237487 = 283 ⋅248189.

It is a cyclic number.

It is not a de Polignac number, because 78473207 - 2²⁰ = 77424631 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78473201) 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, 2308019 + ... + 2308052.

It is an arithmetic number, because the mean of its divisors is an integer number (20772324).

Almost surely, 2^78473207 is an apocalyptic number.

78473207 is a deficient number, since it is larger than the sum of its proper divisors (4616089).

78473207 is a wasteful number, since it uses less digits than its factorization.

78473207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4616088.

The product of its (nonzero) digits is 65856, while the sum is 38.

The square root of 78473207 is about 8858.5104278315. The cubic root of 78473207 is about 428.1281660447.

The spelling of 78473207 in words is "seventy-eight million, four hundred seventy-three thousand, two hundred seven".