71390499 has 4 divisors (see below), whose sum is σ = 95187336. Its totient is φ = 47593664.

The previous prime is 71390491. The next prime is 71390513. The reversal of 71390499 is 99409317.

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 71390499 - 2³ = 71390491 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71390499.

It is not an unprimeable number, because it can be changed into a prime (71390491) 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, 11898414 + ... + 11898419.

It is an arithmetic number, because the mean of its divisors is an integer number (23796834).

Almost surely, 2^71390499 is an apocalyptic number.

71390499 is a deficient number, since it is larger than the sum of its proper divisors (23796837).

71390499 is a wasteful number, since it uses less digits than its factorization.

71390499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23796836.

The product of its (nonzero) digits is 61236, while the sum is 42.

The square root of 71390499 is about 8449.2898518160. The cubic root of 71390499 is about 414.8395353883.

The spelling of 71390499 in words is "seventy-one million, three hundred ninety thousand, four hundred ninety-nine".