71911429 has 4 divisors (see below), whose sum is σ = 72327276. Its totient is φ = 71495584.

The previous prime is 71911421. The next prime is 71911439. The reversal of 71911429 is 92411917.

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

It can be written as a sum of positive squares in 2 ways, for example, as 33756100 + 38155329 = 5810^2 + 6177^2 .

It is a cyclic number.

It is not a de Polignac number, because 71911429 - 2³ = 71911421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71911394 and 71911403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71911421) 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, 207664 + ... + 208009.

It is an arithmetic number, because the mean of its divisors is an integer number (18081819).

Almost surely, 2^71911429 is an apocalyptic number.

It is an amenable number.

71911429 is a deficient number, since it is larger than the sum of its proper divisors (415847).

71911429 is a wasteful number, since it uses less digits than its factorization.

71911429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415846.

The product of its digits is 4536, while the sum is 34.

The square root of 71911429 is about 8480.0606719528. The cubic root of 71911429 is about 415.8461065532.

The spelling of 71911429 in words is "seventy-one million, nine hundred eleven thousand, four hundred twenty-nine".