78410071 has 4 divisors (see below), whose sum is σ = 79695544. Its totient is φ = 77124600.

The previous prime is 78410051. The next prime is 78410077. The reversal of 78410071 is 17001487.

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 78410071 - 2¹⁹ = 77885783 is a prime.

It is a super-2 number, since 2×78410071² = 12296278468450082, 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 (78410077) 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, 642645 + ... + 642766.

It is an arithmetic number, because the mean of its divisors is an integer number (19923886).

Almost surely, 2^78410071 is an apocalyptic number.

78410071 is a deficient number, since it is larger than the sum of its proper divisors (1285473).

78410071 is a wasteful number, since it uses less digits than its factorization.

78410071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285472.

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 78410071 is about 8854.9461319649. The cubic root of 78410071 is about 428.0133177065.

The spelling of 78410071 in words is "seventy-eight million, four hundred ten thousand, seventy-one".