71839479 has 16 divisors (see below), whose sum is σ = 97345152. Its totient is φ = 47119968.

The previous prime is 71839429. The next prime is 71839487. The reversal of 71839479 is 97493817.

It is not a de Polignac number, because 71839479 - 2¹² = 71835383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71839429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51637 + ... + 53009.

It is an arithmetic number, because the mean of its divisors is an integer number (6084072).

Almost surely, 2^71839479 is an apocalyptic number.

71839479 is a deficient number, since it is larger than the sum of its proper divisors (25505673).

71839479 is a wasteful number, since it uses less digits than its factorization.

71839479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646.

The product of its digits is 381024, while the sum is 48.

The square root of 71839479 is about 8475.8173057234. The cubic root of 71839479 is about 415.7073705551.

The spelling of 71839479 in words is "seventy-one million, eight hundred thirty-nine thousand, four hundred seventy-nine".