71231879 has 2 divisors, whose sum is σ = 71231880. Its totient is φ = 71231878.

The previous prime is 71231873. The next prime is 71231899. The reversal of 71231879 is 97813217.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71231879 - 2²⁰ = 70183303 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71231873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35615939 + 35615940.

It is an arithmetic number, because the mean of its divisors is an integer number (35615940).

Almost surely, 2^71231879 is an apocalyptic number.

71231879 is a deficient number, since it is larger than the sum of its proper divisors (1).

71231879 is an equidigital number, since it uses as much as digits as its factorization.

71231879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 38.

The square root of 71231879 is about 8439.8980444079. The cubic root of 71231879 is about 414.5320685100.

The spelling of 71231879 in words is "seventy-one million, two hundred thirty-one thousand, eight hundred seventy-nine".