78247383 has 4 divisors (see below), whose sum is σ = 104329848. Its totient is φ = 52164920.

The previous prime is 78247373. The next prime is 78247399. The reversal of 78247383 is 38374287.

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 78247383 - 2¹³ = 78239191 is a prime.

It is a super-2 number, since 2×78247383² = 12245305892697378, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78247303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13041228 + ... + 13041233.

It is an arithmetic number, because the mean of its divisors is an integer number (26082462).

Almost surely, 2^78247383 is an apocalyptic number.

78247383 is a deficient number, since it is larger than the sum of its proper divisors (26082465).

78247383 is a wasteful number, since it uses less digits than its factorization.

78247383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26082464.

The product of its digits is 225792, while the sum is 42.

The square root of 78247383 is about 8845.7550836545. The cubic root of 78247383 is about 427.7170936625.

The spelling of 78247383 in words is "seventy-eight million, two hundred forty-seven thousand, three hundred eighty-three".