71649319 has 12 divisors (see below), whose sum is σ = 84717048. Its totient is φ = 60404400.

The previous prime is 71649317. The next prime is 71649329. The reversal of 71649319 is 91394617.

It is not a de Polignac number, because 71649319 - 2¹ = 71649317 is a prime.

It is a super-3 number, since 3×71649319³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71649311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8997 + ... + 14974.

It is an arithmetic number, because the mean of its divisors is an integer number (7059754).

Almost surely, 2^71649319 is an apocalyptic number.

71649319 is a deficient number, since it is larger than the sum of its proper divisors (13067729).

71649319 is a wasteful number, since it uses less digits than its factorization.

71649319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24046 (or 24039 counting only the distinct ones).

The product of its digits is 40824, while the sum is 40.

The square root of 71649319 is about 8464.5920752273. The cubic root of 71649319 is about 415.3402522378.

The spelling of 71649319 in words is "seventy-one million, six hundred forty-nine thousand, three hundred nineteen".