71908431 has 24 divisors (see below), whose sum is σ = 113076144. Its totient is φ = 40521600.

The previous prime is 71908409. The next prime is 71908457. The reversal of 71908431 is 13480917.

It is not a de Polignac number, because 71908431 - 2⁵ = 71908399 is a prime.

It is a super-2 number, since 2×71908431² = 10341644897763522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71908392 and 71908401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71908481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7381 + ... + 14081.

It is an arithmetic number, because the mean of its divisors is an integer number (4711506).

Almost surely, 2^71908431 is an apocalyptic number.

71908431 is a deficient number, since it is larger than the sum of its proper divisors (41167713).

71908431 is a wasteful number, since it uses less digits than its factorization.

71908431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6791 (or 6784 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 71908431 is about 8479.8839025072. The cubic root of 71908431 is about 415.8403275740.

The spelling of 71908431 in words is "seventy-one million, nine hundred eight thousand, four hundred thirty-one".