71955479 has 2 divisors, whose sum is σ = 71955480. Its totient is φ = 71955478.

The previous prime is 71955427. The next prime is 71955487. The reversal of 71955479 is 97455917.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71955479 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 (71955419) 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 as a sum of consecutive naturals, namely, 35977739 + 35977740.

It is an arithmetic number, because the mean of its divisors is an integer number (35977740).

Almost surely, 2^71955479 is an apocalyptic number.

71955479 is a deficient number, since it is larger than the sum of its proper divisors (1).

71955479 is an equidigital number, since it uses as much as digits as its factorization.

71955479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 396900, while the sum is 47.

The square root of 71955479 is about 8482.6575434825. The cubic root of 71955479 is about 415.9309993268.

The spelling of 71955479 in words is "seventy-one million, nine hundred fifty-five thousand, four hundred seventy-nine".