71149679 has 4 divisors (see below), whose sum is σ = 71426784. Its totient is φ = 70872576.

The previous prime is 71149657. The next prime is 71149697. The reversal of 71149679 is 97694117.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71149679 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 (71149609) 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, 138167 + ... + 138680.

It is an arithmetic number, because the mean of its divisors is an integer number (17856696).

Almost surely, 2^71149679 is an apocalyptic number.

71149679 is a deficient number, since it is larger than the sum of its proper divisors (277105).

71149679 is a wasteful number, since it uses less digits than its factorization.

71149679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277104.

The product of its digits is 95256, while the sum is 44.

The square root of 71149679 is about 8435.0269116346. The cubic root of 71149679 is about 414.3725535475.

The spelling of 71149679 in words is "seventy-one million, one hundred forty-nine thousand, six hundred seventy-nine".