71498139 has 8 divisors (see below), whose sum is σ = 97359360. Its totient is φ = 46651176.

The previous prime is 71498131. The next prime is 71498143. The reversal of 71498139 is 93189417.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71498139 - 2³ = 71498131 is a prime.

It is a super-2 number, since 2×71498139² = 10223967760926642, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 71498139.

It is not an unprimeable number, because it can be changed into a prime (71498131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253399 + ... + 253680.

It is an arithmetic number, because the mean of its divisors is an integer number (12169920).

Almost surely, 2^71498139 is an apocalyptic number.

71498139 is a deficient number, since it is larger than the sum of its proper divisors (25861221).

71498139 is a wasteful number, since it uses less digits than its factorization.

71498139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507129.

The product of its digits is 54432, while the sum is 42.

The square root of 71498139 is about 8455.6572186909. The cubic root of 71498139 is about 415.0479240151.

The spelling of 71498139 in words is "seventy-one million, four hundred ninety-eight thousand, one hundred thirty-nine".