78371383 has 4 divisors (see below), whose sum is σ = 78541848. Its totient is φ = 78200920.

The previous prime is 78371341. The next prime is 78371389. The reversal of 78371383 is 38317387.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38317387 = 653 ⋅58679.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78371383 is a prime.

It is a super-2 number, since 2×78371383² = 12284147346665378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78371389) 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, 84541 + ... + 85462.

It is an arithmetic number, because the mean of its divisors is an integer number (19635462).

Almost surely, 2^78371383 is an apocalyptic number.

78371383 is a deficient number, since it is larger than the sum of its proper divisors (170465).

78371383 is a wasteful number, since it uses less digits than its factorization.

78371383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170464.

The product of its digits is 84672, while the sum is 40.

The square root of 78371383 is about 8852.7613206276. The cubic root of 78371383 is about 427.9429113450.

The spelling of 78371383 in words is "seventy-eight million, three hundred seventy-one thousand, three hundred eighty-three".