71378503 has 4 divisors (see below), whose sum is σ = 81575440. Its totient is φ = 61181568.

The previous prime is 71378491. The next prime is 71378519. The reversal of 71378503 is 30587317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30587317 = 3691 ⋅8287.

It is not a de Polignac number, because 71378503 - 2⁵ = 71378471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71378533) 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, 5098458 + ... + 5098471.

It is an arithmetic number, because the mean of its divisors is an integer number (20393860).

Almost surely, 2^71378503 is an apocalyptic number.

71378503 is a deficient number, since it is larger than the sum of its proper divisors (10196937).

71378503 is a wasteful number, since it uses less digits than its factorization.

71378503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10196936.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 71378503 is about 8448.5799398479. The cubic root of 71378503 is about 414.8162984315.

The spelling of 71378503 in words is "seventy-one million, three hundred seventy-eight thousand, five hundred three".